Developer
Developer Field
Tools for your everyday developer work: Regex, JSON, UUIDs and more.
Every tool in this field is built to feel intuitive, fast and free of complex instructions.
- 14 tools available
- No sign-up
- Runs in your browser
Regex Tester and Debugger
Test and debug regular expressions online in real time, with capture groups and live match highlighting. Free and in your browser, no upload.
JSON Formatter and Validator
Format, validate and minify JSON online. Beautify messy JSON or compact it in one click, free and entirely in your browser, no upload.
UUID Generator and Validator
Generate, validate and convert UUIDs online: v4, v5, v7, NIL and MAX. Instant and free, in your browser, no upload to any server.
Base64 Encoder and Decoder
Encode and decode Base64 text online, with an optional URL-safe alphabet. Runs in your browser, nothing is uploaded to a server.
URL Slug Generator (Slugify)
Turn any text into a clean URL slug online, ready for permalinks and SEO. Free, instant and in your browser, no upload to any server.
JWT Decoder: Read Token Payload
Decode the header and payload of a JSON Web Token online. No signature verification, free and in your browser, nothing leaves your device.
QR Code Generator (PNG, WiFi)
Create a QR code from any text, URL, WiFi or vCard and download it as PNG or SVG. Free, customizable and in your browser, no upload.
Unix Timestamp Converter
Convert Unix epoch timestamps to readable dates and back online, in seconds or milliseconds. Free and in your browser, no upload.
Secure Password Generator
Generate secure passwords, passphrases, PINs, API keys and openssl rand style secrets online. Cryptographically random, never sent to a server.
Cron Expression Generator and Parser
Build, parse and validate cron expressions for Unix, GitHub Actions, Vercel, Quartz and AWS EventBridge. See plain-language descriptions and the next run times. In your browser.
Hash Generator: SHA-1, SHA-256, SHA-384, SHA-512
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or a file, right in your browser. Zero dependencies, output in hex or base64, and nothing is ever uploaded.
Timezone Converter and Meeting Planner
Convert a time across time zones with correct daylight saving, and find the hours that overlap for a meeting. Add as many zones as you need, set working hours, and read the shared window at a glance. Everything runs in your browser.
URL Encoder / Decoder and Query String Editor
Encode or decode URLs the right way, with an explicit choice between component and full-URI escaping, and edit any query string as a table of key/value pairs. Everything runs in your browser, nothing is uploaded.
HTML Entity Encoder and Decoder
Escape text into HTML entities, or turn entities back into plain text. Named, decimal or hexadecimal, all in your browser and nothing sent anywhere.
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Convert, trim and work with audio and video files.