Developer Tools
Free, privacy-first tools for developers. All processing happens in your browser.
Tool Categories
Choose a category to explore our collection of developer tools
Structured Data
XML Tools 11 tools
Validate, transform, query, and convert XML documents with XSD and XSLT.
JSON Tools 10 tools
Validate, query with jq, and convert JSON to XML, CSV, YAML, and more.
CSV Tools 8 tools
Parse, validate, query, and convert CSV to JSON, XML, YAML, and more.
TON Tools 9 tools
Validate, convert TON to JSON, XML, CSV, YAML, and more formats.
YAML Tools 10 tools
Validate, format, convert YAML to JSON, XML, CSV, and more.
Text Tools
Code Formatter 1 tool
Format and beautify code using Prettier. JS, TS, HTML, CSS, JSON.
Text Encoding 6 tools
Base64, URL encoding, HTML entities, hashing, and text diff.
Regex Tester 1 tool
Test regular expressions with real-time matching and flavor hints.
Text Edit Tools 17 tools
Lists, escaping, encoding, casing, quotes, sorting, and more.
Files
Image Tools 3 tools
Convert, compress, and edit images in your browser.
PDF Tools 5 tools
Merge, split, rotate pages and extract text or images from PDFs.
Authentication
Certificate Tools 4 tools
Decode X.509 certificates, verify chains, and convert JWK/PEM.
SAML Tools 3 tools
Decode, validate, and inspect SAML responses and assertions.
JWT Tools 3 tools
Decode, validate, and build JSON Web Tokens with signatures.
OAuth 2.0 Tools 3 tools
Build authorization URLs, generate PKCE, and debug tokens.
OpenID Connect 2 tools
Fetch discovery documents and inspect ID tokens.
Auth Utilities 1 tool
Generate secure passwords, secrets, and authentication values.
Web Tools
Web Tools 8 tools
IP lookup, browser info, geolocation, speed test, and more.
Miscellaneous
Cron Tools 3 tools
Parse, build, and visualize cron expressions and schedules.
Why Use Our Tools?
100% Private
All processing happens in your browser using JavaScript. Your data never touches our servers or any external services.
Fast & Instant
No uploads, no waiting. Tools run instantly in your browser, even with large files.
Works Offline
Once loaded, most tools work without an internet connection. Perfect for air-gapped environments.
Completely Free
No subscriptions, no premium tiers, no feature gates. All tools are free to use without limitations.
Mobile Friendly
Responsive design works on desktop, tablet, and mobile devices.
Developer Focused
Built by developers, for developers. Features like syntax highlighting and keyboard shortcuts included.