13 free developer tools
Hashes, encoders, JWTs, regex and formatting helpers. Every tool lists the inputs it accepts, what it produces, its capacity and what happens to your file before you upload anything.
Format, validate, beautify and minify JSON or convert JSON to XML, CSV and YAML using one online toolbox.
Format and beautify JavaScript, TypeScript, HTML, CSS, SQL, Python, PHP, JSON and XML online.
Encode and decode Base64, URLs and HTML entities or generate SHA-256, SHA-512, MD5, UUIDs and random strings.
Upload a file and automatically discover available conversions for PDFs, images, Word documents, Excel files, CSV and more.
Generate average hash, difference hash and color statistics for comparing or deduplicating images.
Format, minify and validate XML or convert XML documents into JSON-friendly structures.
Decode JWT header and payload data locally in your browser without verifying, cracking or sending the token anywhere.
Test a regular expression against sample text and inspect matches, groups, indexes and replacement output locally.
Convert common Markdown headings, emphasis, lists, links and code blocks into previewable HTML.
Parse a URL into protocol, hostname, port, path, query parameters, fragment and normalized URL fields.
Calculate SHA-256, SHA-512 and MD5 checksums for uploaded files without changing their contents.
Inspect file name, extension, MIME guess, size, timestamps where available and format-specific details for common media.
Detect a file type from its signature, extension and parsable format information instead of trusting the filename alone.
Other file types
Convert, compress, merge, split, sign, protect and clean PDF files.
Resize, compress, convert, upscale and strip metadata from photos.
Move between Word, Excel, PowerPoint, HTML and plain text.
Convert, trim, compress and resize video, or pull audio and frames out of it.
Convert, trim, normalise and inspect audio files.
Create and extract ZIP, TAR and GZIP archives safely.
Convert between CSV, JSON, XLSX, XML and YAML.
Clean, compare, count and transform text.
The odds and ends: QR codes, colour tools, file inspection.