Free browser-based utilities that streamline coding tasks with instant text processing, data conversion, and validation capabilities.
Gzip / Zlib / Deflate Tester Compress and decompress data using gzip, zlib, and raw deflate formats directly in your browser. Test compression output, verify data integrity, and measure size savings — all client-side with no data leaving your machine. How to Use 1. Choose your mode: Compress or Decompress. 2. For compression: paste text ...
Try the Tool »CBOR Encoder / Decoder Encode JSON to CBOR and decode CBOR back to JSON — fully client-side. CBOR (Concise Binary Object Representation) is a compact binary data format defined in RFC 8949, widely used in IoT, WebAuthn, and COSE protocols. How to Use Switch between Decode and Encode modes. To decode, paste CBOR data as ...
Try the Tool »File Extension Lookup Instantly identify any file type by its extension. Search a database of 500+ file extensions to find descriptions, MIME types, and which programs open them on Windows, macOS, and Linux. How to Use Type a file extension (like .docx or .mp4), a MIME type, or a keyword (like “video” or “image”) into ...
Try the Tool »Character Encoding Detector Detect the character encoding of any text or file, convert between encodings, and fix mojibake — all client-side. Supports UTF-8, UTF-16, ISO-8859, Windows codepages, Shift_JIS, EUC-JP, GBK, Big5, KOI8-R, and more. How to Use Paste text or upload a file to detect its encoding. The tool analyzes byte patterns and displays possible ...
Try the Tool »Bech32 Address Encoder/Decoder Encode, decode, and validate Bitcoin SegWit addresses using the Bech32 (BIP 173) and Bech32m (BIP 350) specifications. Instantly verify checksums, identify address types (P2WPKH, P2WSH, P2TR), and convert between hex witness programs and human-readable addresses. How to Use Decode: Paste a Bitcoin SegWit address to see its human-readable part, witness version, witness ...
Try the Tool »MessagePack to JSON Converter Convert between MessagePack binary format and JSON instantly in your browser. Decode MessagePack hex or Base64 strings into readable JSON, or encode JSON data into compact MessagePack format. How to Use Decode: Select Decode mode, choose your input format (Hex or Base64), paste your MessagePack data, and get pretty-printed JSON output ...
Try the Tool »Data URI Scheme Generator Convert files and text into RFC 2397 Data URIs directly in your browser. Upload any file or paste text content to generate a complete data URI with the correct MIME type, ready to embed in HTML, CSS, or JavaScript. How to Use File mode: Upload or drag-and-drop any file (images, fonts, ...
Try the Tool »CSP Generator & Evaluator Build and validate Content Security Policy headers with a visual interface. Generate CSP headers by selecting directives and source values, or evaluate existing policies by pasting them for syntax validation and security analysis. How to Use Generate mode: Select a preset (Strict, Moderate, or Permissive) or customize individual directives like default-src, ...
Try the Tool »Webhook Signature Validator Validate and generate HMAC-based webhook signatures directly in your browser. Verify that incoming webhook payloads are authentic by checking their cryptographic signatures, or generate signatures for testing your webhook endpoints. How to Use Validate mode: Paste the webhook payload body, enter your secret key, paste the received signature, and select the algorithm. ...
Try the Tool »CRLF / LF Line Ending Converter Convert text between different line ending formats instantly. Whether you’re working across Windows, Linux, and macOS, this tool ensures your files use the correct line endings for each platform. How to Use 1. Paste your text or upload a file into the input area. 2. The tool automatically detects ...
Try the Tool »CSS Box Shadow Generator Design beautiful box shadows visually with a live preview. Add multiple shadow layers, tweak offsets, blur, spread, and color, then copy the CSS — no manual coding needed. How to Use Adjust the sliders for horizontal and vertical offset, blur radius, spread, and opacity. Toggle inset for inner shadows. Add up ...
Try the Tool »Robots.txt Generator & Validator Build spec-compliant robots.txt files with a visual editor, or validate existing ones against RFC 9309. Includes presets for common configurations, syntax highlighting, and a URL tester to check if specific paths are blocked or allowed. How to Use Switch between Generator and Validator tabs. In Generator mode, pick a preset or ...
Try the Tool »Sitemap.xml Generator Generate valid, schema-compliant sitemap.xml files following the sitemaps.org protocol. Paste URLs, configure per-URL settings like priority and change frequency, then download your sitemap ready to upload to your server. How to Use Paste your URLs one per line, or upload a CSV file with URL metadata. Set default values for change frequency and ...
Try the Tool »Dockerfile Linter & Formatter Lint and format your Dockerfiles with best-practice rules inspired by hadolint. Check for security issues, optimize layers, enforce conventions, and format consistently — all in the browser. How to Use Paste your Dockerfile into the Linter tab to scan for errors, warnings, and optimization opportunities. Each issue shows the line number, ...
Try the Tool »Rust Code Formatter Format your Rust code following official rustfmt conventions. Paste your code, configure formatting options, and get clean, consistently styled output matching cargo fmt standards. How to Use Paste your Rust code into the editor, select your preferred max line width (80, 100, or 120 characters) and Rust edition (2015, 2018, or 2021), ...
Try the Tool »Python Code Formatter Format your Python code following Black and PEP 8 conventions. Paste your code, choose your preferred line length, and get clean, consistently styled output with import sorting and proper spacing. How to Use Paste your Python code into the editor, select your preferred max line length (79, 88, or 120 characters), then ...
Try the Tool »RGB to CMYK Converter Convert colors between RGB (screen) and CMYK (print) color spaces instantly. Essential for designers preparing files for print production who need accurate color space translations. How to Use Enter your color using RGB values (0-255), hex code, or the color picker. The tool instantly converts to CMYK percentages. Switch to CMYK→RGB ...
Try the Tool »SVG Optimizer & Minifier Optimize and compress your SVG files for faster web performance. Remove unnecessary metadata, minify path data, and reduce file size while keeping visual quality intact — all without leaving your browser. How to Use Upload an SVG file or paste SVG code directly. Choose an optimization preset — Light for safe ...
Try the Tool »CSS Border Radius Generator Visually design rounded corners for your CSS elements. Adjust each corner independently, use elliptical radii, pick from presets, and copy the CSS code — all with a live preview. How to Use Choose simple mode to set all corners at once, or switch to advanced mode for individual corner control. Enable ...
Try the Tool »Analyze Your Text Readability Check how easy or difficult your text is to read using six established readability formulas. Paste any text — articles, blog posts, emails, or documents — and get instant scores with grade level interpretations. How to Use Paste or type your text into the input area and click Calculate. The tool ...
Try the Tool »Add IO tools to your favorite browser for instant access and faster searching
Scoreboard is a fun way to keep track of your games, all data is stored in your browser. More features are coming soon!
Update: Our latest tool was added on Apr 19, 2026
Help us continue providing valuable free tools
