Developer tools

31 free Developer tools that run in your browser, including JSON Formatter, JSON to CSV, CSV to JSON, JSON to XML. No upload, no sign-up, no watermark.

  • JSON Formatter & Validator — Beautify, minify and validate JSON with exact error positions, key sorting and a collapsible tree view.
  • JSON to CSV Converter — Turn a JSON array into CSV with nested fields flattened to dot paths and a choice of delimiter.
  • CSV to JSON Converter — Convert CSV or TSV into a JSON array, with header detection, type inference and nested keys from dot paths.
  • JSON to XML Converter — Convert JSON into well-formed, indented XML with configurable root element and attribute handling.
  • XML to JSON Converter — Parse XML into JSON, keeping attributes under a prefix you choose and converting numbers and booleans.
  • YAML to JSON Converter — Convert YAML (including multi-document files) into JSON using a safe loader that never runs custom tags.
  • JSON to YAML Converter — Turn JSON into clean YAML with configurable indentation, ready for config files and Kubernetes manifests.
  • XML Formatter & Validator — Indent, minify and validate XML, with the exact line and column of any well-formedness error.
  • SQL Formatter — Format SQL for MySQL, PostgreSQL, SQL Server, SQLite, BigQuery and more, with keyword case control.
  • HTML, CSS & JavaScript Formatter — Beautify HTML, CSS, JavaScript, TypeScript and JSON with Prettier, running entirely in your browser.
  • JavaScript, CSS & HTML Minifier — Minify JavaScript with Terser, CSS and HTML safely, and see exactly how many bytes you saved.
  • Base64 Encoder & Decoder — Encode and decode Base64 for UTF-8 text and any file, including the URL-safe variant.
  • Image to Base64 Converter — Convert images into Base64 data URIs with ready-to-paste HTML and CSS snippets.
  • Base64 to Image Converter — Paste a Base64 string or data URI to preview the image, detect its type and download it.
  • URL Encoder & Decoder — Percent-encode or decode URLs and components, and break query strings into an editable table.
  • HTML Entity Encoder & Decoder — Escape text into HTML entities (named or numeric) and decode entities back to characters.
  • JWT Decoder & Verifier — Decode a JWT's header and payload with readable claims, and optionally verify its signature locally.
  • Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes or HMACs of text and files.
  • UUID / GUID Generator — Generate random UUID v4 or time-ordered v7 identifiers in bulk, in the format you need.
  • Strong Password Generator — Create strong random passwords or passphrases with a strength meter, using your device's secure randomness.
  • Regex Tester — Test regular expressions with live match highlighting, capture groups and a replace preview.
  • Unix Timestamp Converter — Convert Unix timestamps in seconds or milliseconds to readable dates in any time zone, and back.
  • Binary, Hex & Decimal Converter — Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36, of any size.
  • Color Converter — Convert colours between HEX, RGB, HSL, HSV, CMYK and CSS names, and check WCAG contrast.
  • Online Color Picker — Pick colours with a visual picker or grab them from anywhere on screen, and copy them in any format.
  • CSS Gradient Generator — Design linear, radial and conic gradients visually and copy the CSS.
  • Color Palette Generator — Generate colour palettes from harmony rules or at random, lock favourites, and export as CSS or JSON.
  • QR Code Generator — Create QR codes for links, text, Wi-Fi, contacts, email, SMS and UPI payments, as PNG or SVG.
  • QR Code Scanner — Scan QR codes with your camera or from an image file, right in the browser.
  • Barcode Generator — Generate Code 128, EAN-13, EAN-8, UPC-A, Code 39, ITF-14, Codabar and MSI barcodes, with check digits added or verified.
  • Barcode Scanner — Read EAN, UPC, Code 128, Code 39 and other barcodes from your camera or an image.