Free Developer and Data Tools

JSON Formatter Data Format, validate, pretty-print, and minify JSON API responses, config files, logs, and webhook payloads directly in the browser without uploading data. ZIP Compressor and Extractor File Compress files into ZIP archives or extract ZIP contents in a browser-first workflow. PDF Merge File Merge multiple PDF files into one browser-prepared document for submissions, scans, estimates, contracts, and shareable packets. CSV to JSON Converter Data Convert CSV rows into JSON arrays for testing, migration, and quick data transformation. Password Generator Security Generate strong random password candidates with configurable length and character sets for accounts, password managers, and test environments. Regex Tester Developer Test JavaScript regular expressions against sample text to inspect matches, debug validation patterns, and refine text extraction rules. UUID Generator Developer Generate UUID values for test data, prototypes, and development workflows. JSON Editor Data Edit JSON values in the browser and keep structure visible while you work. JSON Tree Viewer Data Explore nested JSON in a readable tree view for faster data inspection. CSV Editor Data Inspect and edit CSV data in the browser before copying or exporting results. JSON Data Compare Data Compare JSON data structures and spot changes between two payloads. JSON to CSV Converter Data Convert JSON arrays into CSV tables that are easier to inspect or import. JSON to YAML Converter Data Convert JSON into YAML for configuration, documentation, and development workflows. CSV to YAML Converter Data Convert CSV rows into YAML blocks for data migration and configuration drafts. YAML Validator Data Check YAML indentation, tabs, key-value lines, and common syntax risks directly in your browser. HTML CSS JS Minifier Developer Minify HTML, CSS, and JavaScript snippets for quick optimization tests. HTML CSS JS Formatter Developer Format HTML, CSS, and JavaScript snippets so code is easier to read. SQL Formatter Data Format SQL queries for review, debugging, and documentation. robots.txt Generator Developer Create crawler allow and disallow rules plus sitemap references for a simple robots.txt file. URL Query Parser and Builder Developer Inspect a URL, edit query parameters as key-value rows, and rebuild a clean shareable link without sending it to a server. HTML Entity Encoder and Decoder Developer Encode reserved HTML characters into entities or decode entity text back into readable copy before publishing or testing markup. Environment File Sorter and Duplicate Checker File Sort environment variable samples, detect duplicate keys, and flag empty values before sharing configuration examples. XML to JSON Converter Data Convert XML data into JSON for API debugging and quick data transformation. JSON to XML Converter Data Convert JSON objects into XML markup for integration testing and data exchange. YAML JSON Converter Data Convert between YAML and JSON for configuration and documentation workflows. PDF Split File Split PDF documents into smaller files or selected page groups for sharing, cleanup, storage, and browser-first document preparation. Markdown to PDF File Convert Markdown content into a PDF-style document workflow in the browser. PDF Text Extraction and OCR Readiness Check File Inspect a local PDF header, classify selectable-text and scanned-page workflows, and plan privacy-safe extraction without pretending to run image OCR. Base64 Encoder and Decoder Developer Encode plain text to Base64 or decode Base64 strings for API examples, configuration snippets, webhook samples, and development documentation. URL Encoder and Decoder Developer Encode and decode URL components, query strings, Korean text, spaces, redirect values, and campaign parameters for safer links and API tests. Hash Generator Security Generate common hashes for text values locally in your browser. HMAC Generator Security Generate HMAC values for sample messages and local development checks. JWT Decoder Security Decode JWT header and payload JSON in the browser to inspect claims, expiry timestamps, issuer values, and authentication debugging details. Unix Timestamp Converter Developer Convert Unix timestamps in seconds or milliseconds into readable dates, and convert dates back for logs, JWT expiry, APIs, and scheduled work. Cron Expression Builder Developer Build and inspect cron expressions for scheduled jobs and automation workflows. Password Strength Checker Security Password Strength Checker helps you check password strength indicators and review whether a password pattern looks too predictable. Browser Environment Checker Network Review browser and operating-system hints, screen and viewport details, locale, time zone, and available device capabilities without retrieving your public IP address. DNS Record Lookup Network Look up DNS record information for domains and basic web operations checks. Subnet Mask Calculator Network Calculate subnet ranges and network values for quick networking references. Simple Port Scanner Network Simple Port Scanner helps you check simple port-style input and network reference notes for lightweight troubleshooting workflows. SVG Data URI Converter File Convert SVG markup into data URI values for CSS and HTML experiments. Favicon Generator File Create favicon assets for websites and quick prototype projects. Number Base Converter Developer Convert numbers between binary, decimal, hexadecimal, and other common bases. Random Dummy Data Generator Data Random Dummy Data Generator helps you generate random dummy values for testing forms, tables, mockups, and development examples. NDJSON and JSON Lines Validator Data Validate JSON Lines one record at a time, report exact error lines, and convert between NDJSON and a JSON array. cURL to Fetch Converter Developer Parse a pasted cURL command into URL, method, headers, and body, then generate browser fetch code without executing the request. HTTP Header Security Checker Security Parse raw HTTP response headers and review security, caching, content type, and CORS settings plus notable omissions. JSON Schema Validator Data Validate pasted JSON against a JSON Schema and review required properties, value types, and validation errors directly in the browser. JSONPath Tester Data Run a JSONPath expression against pasted JSON and inspect the matching values and locations without uploading the data. GraphQL Query Formatter Developer Format a GraphQL query with readable indentation and field nesting so requests are easier to review, share, and debug. ULID Generator Developer Generate one or more 26-character ULIDs with time-sortable prefixes using browser-side randomness. Nano ID Generator Developer Generate Nano IDs with a chosen length for compact test records, URLs, and browser-side prototypes. IPv4 and IPv6 Converter Network Convert an IPv4 address into integer, hexadecimal, and IPv4-mapped IPv6 forms while checking the input structure. URL Parser and Query Analyzer Developer Parse a URL into protocol, host, port, path, query parameters, and hash values for quick inspection. User-Agent Parser Developer Inspect a User-Agent string and identify likely browser, operating system, device class, and rendering engine signals. MIME Type Lookup Developer Look up common MIME types by file extension or MIME value for upload rules, response headers, and file handling checks. HTTP Status Code Lookup Developer Look up an HTTP status code or keyword and review its standard meaning and common web usage. Content Security Policy Builder Security Build a Content-Security-Policy header from source directives and optional insecure-request upgrading settings. Subresource Integrity Hash Generator Security Generate SHA-256, SHA-384, or SHA-512 Subresource Integrity values from pasted resource content in the browser. Semantic Version Compare Developer Compare two semantic versions, including prerelease labels, and identify major, minor, patch, or precedence differences. PEM Certificate Structure Checker Developer Inspect a PEM block label, Base64 payload validity, byte length, and certificate-style structural fields without treating it as an award template. YAML Diff Checker Data Compare two YAML documents by path and list added, removed, and changed values in a structured result. CSV Delimiter Detector Data Analyze pasted tabular text and estimate whether comma, tab, semicolon, or pipe is the most consistent delimiter. CSV Column Mapper Data Select, reorder, and rename CSV columns to produce a new table layout; this tool maps data columns, not geographic locations. Unix File Permission Calculator File Convert Unix file permissions between octal chmod notation and symbolic rwx flags. File Signature and Magic Number Checker File Inspect a local file's leading bytes and compare its magic number with common file signatures and browser MIME information. JWT Claim Time Checker Security Decode JWT time claims such as iat, nbf, and exp into readable dates and compare them with the current time. Regex Escape Tool Developer Escape regular-expression metacharacters in plain text so the result can be used as a literal search pattern. dotenv Validator Developer Check pasted dotenv content for malformed keys, duplicates, empty values, and values that resemble exposed secrets. JSON Pointer Tester Data Resolve an RFC 6901 JSON Pointer against pasted JSON and display the value at the requested path. Cookie and Set-Cookie Parser Developer Parse Cookie or Set-Cookie text into names, values, attributes, and security flags such as Secure, HttpOnly, and SameSite. WebSocket URL Builder Developer Convert an HTTP or WebSocket base URL plus key-value parameters into a clean ws or wss connection URL. XML Formatter and Validator Data XML Formatter and Validator reads pasted data or a file and shows converted output and any error positions. Copy or download the result. XML Minifier Data XML Minifier reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. XPath Tester Developer XPath Tester turns pasted data or a file into converted output and any error positions. Files are read on your device. XSLT Transformer Playground Developer Give XSLT Transformer Playground pasted data or a file and it returns converted output and any error positions. The same input always gives the same result. TOML Formatter and Validator Developer Give TOML Formatter and Validator pasted data or a file and it returns converted output and any error positions. It flags anything worth a second look. TOML JSON Converter Data TOML JSON Converter turns pasted data or a file into converted output and any error positions. Sample values are prefilled. INI Formatter and Validator Developer INI Formatter and Validator reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. INI JSON Converter Data Give INI JSON Converter pasted data or a file and it returns converted output and any error positions. Files are read on your device. TSV CSV Converter Data TSV CSV Converter turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. TSV JSON Converter Data TSV JSON Converter turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. JSON Flatten and Unflatten Data JSON Flatten and Unflatten reads pasted data or a file and shows converted output and any error positions. Files are read on your device. JSON Key and Path Extractor Data Give JSON Key and Path Extractor pasted data or a file and it returns converted output and any error positions. Nothing is uploaded. JSON Array Table Explorer Data JSON Array Table Explorer reads pasted data or a file and shows converted output and any error positions. Nothing is uploaded. JSON to TypeScript Types Data JSON to TypeScript Types reads pasted data or a file and shows converted output and any error positions. It flags anything worth a second look. JSON Sample to Schema Data JSON Sample to Schema turns pasted data or a file into converted output and any error positions. Files are read on your device. JSON Merge Patch Tool Data Give JSON Merge Patch Tool pasted data or a file and it returns converted output and any error positions. It flags anything worth a second look. JSON Patch Builder and Applier Data JSON Patch Builder and Applier reads pasted data or a file and shows converted output and any error positions. It flags anything worth a second look. NDJSON Filter and Map Tool Data NDJSON Filter and Map Tool reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. CSV Filter Query Tool Data CSV Filter Query Tool reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. CSV Row Sorter Data CSV Row Sorter turns pasted data or a file into converted output and any error positions. Files are read on your device. CSV Duplicate Remover Data CSV Duplicate Remover reads pasted data or a file and shows converted output and any error positions. Nothing is uploaded. Merge CSV Files File Merge CSV Files reads pasted data or a file and shows converted output and any error positions. Sample values are prefilled. CSV Key Join Data CSV Key Join turns pasted data or a file into converted output and any error positions. It flags anything worth a second look. CSV Pivot and Unpivot Data Give CSV Pivot and Unpivot pasted data or a file and it returns converted output and any error positions. Files are read on your device. CSV Group and Aggregate File CSV Group and Aggregate reads pasted data or a file and shows converted output and any error positions. No install and no sign-in. CSV Column Statistics Data CSV Column Statistics turns pasted data or a file into converted output and any error positions. No install and no sign-in. CSV Encoding Converter Data Give CSV Encoding Converter pasted data or a file and it returns converted output and any error positions. No install and no sign-in. CSV Header Normalizer Data CSV Header Normalizer reads pasted data or a file and shows converted output and any error positions. Sample values are prefilled. CSV Data Profiler File CSV Data Profiler reads pasted data or a file and shows converted output and any error positions. Everything happens inside this tab. CSV Rule Validator Data CSV Rule Validator reads pasted data or a file and shows converted output and any error positions. No install and no sign-in. CSV to SQL INSERT Generator Data CSV to SQL INSERT Generator turns pasted data or a file into converted output and any error positions. It flags anything worth a second look. SQL Minifier Data Give SQL Minifier pasted data or a file and it returns converted output and any error positions. Nothing is uploaded. SQL Parameter Binder Data SQL Parameter Binder turns pasted data or a file into converted output and any error positions. No install and no sign-in. SQL IN Clause Builder Data SQL IN Clause Builder reads pasted data or a file and shows converted output and any error positions. Sample values are prefilled. SQL DDL to ER Diagram Data SQL DDL to ER Diagram turns pasted data or a file into converted output and any error positions. It flags anything worth a second look. Bulk URL Normalizer Developer Bulk URL Normalizer turns pasted data or a file into converted output and any error positions. The same input always gives the same result. Relative URL Resolver Developer Give Relative URL Resolver pasted data or a file and it returns converted output and any error positions. No install and no sign-in. URL Query Diff Developer Give URL Query Diff pasted data or a file and it returns converted output and any error positions. The same input always gives the same result. Punycode IDN Converter Developer Punycode IDN Converter reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. Unicode Escape Converter Developer Unicode Escape Converter turns pasted data or a file into converted output and any error positions. The same input always gives the same result. JavaScript String Escape Tool Network JavaScript String Escape Tool turns pasted data or a file into converted output and any error positions. Copy or download the result. Shell Argument Quote Builder Developer Give Shell Argument Quote Builder pasted data or a file and it returns converted output and any error positions. Files are read on your device. Base32 Encoder and Decoder Developer Give Base32 Encoder and Decoder pasted data or a file and it returns converted output and any error positions. It flags anything worth a second look. Base58 Encoder and Decoder Developer Base58 Encoder and Decoder turns pasted data or a file into converted output and any error positions. Files are read on your device. Base85 (ASCII85) Encoder and Decoder Developer Base85 (ASCII85) Encoder and Decoder turns pasted data or a file into converted output and any error positions. The same input always gives the same result. Crockford Base32 Converter Developer Crockford Base32 Converter turns pasted data or a file into converted output and any error positions. Copy or download the result. File Checksum Comparator File File Checksum Comparator turns pasted data or a file into converted output and any error positions. The same input always gives the same result. Multi-file Checksum Manifest File Multi-file Checksum Manifest turns pasted data or a file into converted output and any error positions. Sample values are prefilled. CRC Checksum Calculator Developer Give CRC Checksum Calculator pasted data or a file and it returns converted output and any error positions. No install and no sign-in. OAuth PKCE Generator Developer Give OAuth PKCE Generator pasted data or a file and it returns converted output and any error positions. Files are read on your device. Basic Auth Header Generator Developer Basic Auth Header Generator turns pasted data or a file into converted output and any error positions. The same input always gives the same result. CORS Header Generator Developer Give CORS Header Generator pasted data or a file and it returns converted output and any error positions. The same input always gives the same result. Permissions Policy Generator Developer Give Permissions Policy Generator pasted data or a file and it returns converted output and any error positions. The same input always gives the same result. security.txt Generator Security security.txt Generator turns pasted data or a file into converted output and any error positions. It flags anything worth a second look. gitignore Generator Developer Give gitignore Generator pasted data or a file and it returns converted output and any error positions. Files are read on your device. EditorConfig Generator Developer EditorConfig Generator reads pasted data or a file and shows converted output and any error positions. Everything happens inside this tab. Conventional Commit Builder Developer Give Conventional Commit Builder pasted data or a file and it returns converted output and any error positions. Copy or download the result. Git Reference Name Validator Developer Git Reference Name Validator turns pasted data or a file into converted output and any error positions. No install and no sign-in. Dockerfile Linter File Dockerfile Linter reads pasted data or a file and shows converted output and any error positions. Everything happens inside this tab. Docker Compose Validator Developer Give Docker Compose Validator pasted data or a file and it returns converted output and any error positions. It flags anything worth a second look. Kubernetes YAML Validator Data Give Kubernetes YAML Validator pasted data or a file and it returns converted output and any error positions. Files are read on your device. OpenAPI Formatter and Validator Developer Give OpenAPI Formatter and Validator pasted data or a file and it returns converted output and any error positions. Sample values are prefilled. OpenAPI Operation Extractor Developer OpenAPI Operation Extractor reads pasted data or a file and shows converted output and any error positions. Files are read on your device. HTTP Request to cURL Developer HTTP Request to cURL turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. cURL to Code Generator Developer cURL to Code Generator turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. Multipart Form Data Builder Data Multipart Form Data Builder turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. GraphQL Variables Validator Developer GraphQL Variables Validator turns pasted data or a file into converted output and any error positions. The same input always gives the same result. Protobuf Wire Decoder Developer Protobuf Wire Decoder reads pasted data or a file and shows converted output and any error positions. No install and no sign-in. MessagePack Viewer and Converter Developer MessagePack Viewer and Converter turns pasted data or a file into converted output and any error positions. Sample values are prefilled. DNS Zone File Validator File DNS Zone File Validator reads pasted data or a file and shows converted output and any error positions. Nothing is uploaded. PDF Page Rotator File PDF Page Rotator turns the file you pick into the processed file and a change summary. Nothing is uploaded. PDF Page Reorder Tool File PDF Page Reorder Tool reads the file you pick and shows the processed file and a change summary. No install and no sign-in. PDF Page Deleter File PDF Page Deleter reads the file you pick and shows the processed file and a change summary. Everything happens inside this tab. PDF Margin Cropper File PDF Margin Cropper turns the file you pick into the processed file and a change summary. Copy or download the result. Images to PDF Converter File Images to PDF Converter turns the file you pick into the processed file and a change summary. Everything happens inside this tab. XLSX Formula Inventory Developer XLSX Formula Inventory reads the file you pick and shows the processed file and a change summary. Everything happens inside this tab. PDF Watermark Tool File PDF Watermark Tool reads the file you pick and shows the processed file and a change summary. Sample values are prefilled. PDF Page Number Adder File Give PDF Page Number Adder the file you pick and it returns the processed file and a change summary. Sample values are prefilled. XLSX Sheet Comparator Developer XLSX Sheet Comparator turns the file you pick into the processed file and a change summary. Everything happens inside this tab. PDF Page Size Converter File Give PDF Page Size Converter the file you pick and it returns the processed file and a change summary. Sample values are prefilled. PDF N-up Layout Tool File Give PDF N-up Layout Tool the file you pick and it returns the processed file and a change summary. Everything happens inside this tab. PDF Booklet Imposition Tool File PDF Booklet Imposition Tool reads the file you pick and shows the processed file and a change summary. It flags anything worth a second look. PDF Metadata Viewer and Remover File PDF Metadata Viewer and Remover reads the file you pick and shows the processed file and a change summary. No install and no sign-in. XLSX Duplicate Row Remover Developer XLSX Duplicate Row Remover turns the file you pick into the processed file and a change summary. It flags anything worth a second look. XLSX Column Mapper Developer XLSX Column Mapper turns the file you pick into the processed file and a change summary. It flags anything worth a second look. PDF Form Filler and Flattener File Give PDF Form Filler and Flattener the file you pick and it returns the processed file and a change summary. No install and no sign-in. PDF Signature and Stamp Tool File PDF Signature and Stamp Tool turns the file you pick into the processed file and a change summary. The same input always gives the same result. XLSX to HTML Table Developer Give XLSX to HTML Table the file you pick and it returns the processed file and a change summary. Everything happens inside this tab. XLSX Hidden Sheet Auditor Developer Give XLSX Hidden Sheet Auditor the file you pick and it returns the processed file and a change summary. It flags anything worth a second look. XLSX Workbook Statistics Developer Give XLSX Workbook Statistics the file you pick and it returns the processed file and a change summary. Files are read on your device. DOCX Structure Analyzer Developer DOCX Structure Analyzer reads the file you pick and shows the processed file and a change summary. Copy or download the result. DOCX Comments and Revisions Inspector Developer DOCX Comments and Revisions Inspector reads the file you pick and shows the processed file and a change summary. Nothing is uploaded. PDF Page Size and Count Analyzer File Give PDF Page Size and Count Analyzer the file you pick and it returns the processed file and a change summary. Everything happens inside this tab. Office Metadata Cleaner Data Office Metadata Cleaner reads the file you pick and shows the processed file and a change summary. Copy or download the result. PDF Attachment Embedder File Give PDF Attachment Embedder the file you pick and it returns the processed file and a change summary. Files are read on your device. CSV to XLSX Converter Data CSV to XLSX Converter reads the file you pick and shows the processed file and a change summary. Sample values are prefilled. XLSX to CSV and JSON Converter Data Give XLSX to CSV and JSON Converter the file you pick and it returns the processed file and a change summary. It flags anything worth a second look. XLSX Sheet Splitter Developer XLSX Sheet Splitter reads the file you pick and shows the processed file and a change summary. Nothing is uploaded. XLSX Workbook Merger Developer XLSX Workbook Merger reads the file you pick and shows the processed file and a change summary. Nothing is uploaded. DOCX Text and Metadata Extractor Data DOCX Text and Metadata Extractor turns the file you pick into the processed file and a change summary. Files are read on your device. HTML Language Tag Checker Developer HTML Language Tag Checker turns pasted data or a file into converted output and any error positions. Everything happens inside this tab. BCP 47 Language Tag Builder Developer BCP 47 Language Tag Builder reads pasted data or a file and shows converted output and any error positions. No install and no sign-in. ISO Country Language and Currency Lookup Developer ISO Country Language and Currency Lookup reads pasted data or a file and shows converted output and any error positions. Files are read on your device. IANA Timezone Lookup Developer IANA Timezone Lookup turns pasted data or a file into converted output and any error positions. Copy or download the result. Locale Date Format Preview Developer Locale Date Format Preview turns pasted data or a file into converted output and any error positions. It flags anything worth a second look. Locale Number and Currency Preview Developer Give Locale Number and Currency Preview pasted data or a file and it returns converted output and any error positions. Nothing is uploaded. ICU Message Format Validator Developer ICU Message Format Validator reads pasted data or a file and shows converted output and any error positions. It flags anything worth a second look. Bidirectional Text Control Inspector Developer Bidirectional Text Control Inspector reads pasted data or a file and shows converted output and any error positions. Copy or download the result. E.164 Phone Number Normalizer Developer E.164 Phone Number Normalizer reads pasted data or a file and shows converted output and any error positions. Everything happens inside this tab. IBAN Checksum Validator Developer IBAN Checksum Validator turns pasted data or a file into converted output and any error positions. Files are read on your device. BIC SWIFT Format Checker Developer BIC SWIFT Format Checker reads pasted data or a file and shows converted output and any error positions. The same input always gives the same result. Kana Romaji Transliterator Developer Kana Romaji Transliterator turns pasted data or a file into converted output and any error positions. No install and no sign-in. Cyrillic Latin Transliterator Developer Cyrillic Latin Transliterator turns pasted data or a file into converted output and any error positions. Nothing is uploaded. Greek Latin Transliterator Developer Greek Latin Transliterator turns pasted data or a file into converted output and any error positions. Files are read on your device. Unicode Grapheme Cluster Inspector Developer Give Unicode Grapheme Cluster Inspector pasted data or a file and it returns converted output and any error positions. Nothing is uploaded. AES File Encrypt and Decrypt File AES File Encrypt and Decrypt turns pasted data or a file into converted output and any error positions. Files are read on your device. TOTP Generator and Verifier Developer TOTP Generator and Verifier turns pasted data or a file into converted output and any error positions. Everything happens inside this tab.