Developer
Developer tools that stay on your device.
Base64, JSON, JWT, hashes, regex, diffs, QR codes, passwords, and more — processed locally. No uploads for processing.
Code Workspace
Write and run TypeScript in your browser.
A private scratchpad that transpiles TypeScript to JavaScript and runs it locally with a captured console.
Open tool →Dev toolBase64 Encode/Decode
Encode or decode text and files.
Convert text or files to Base64 (and back), with URL-safe mode and data URI support.
Open tool →Dev toolJSON Formatter
Pretty-print, minify, and validate JSON.
Format, minify, sort keys, convert to YAML/CSV/TypeScript, and query paths — locally.
Open tool →Dev toolJWT Decoder
Decode header, payload, verify HMAC.
Inspect JWT segments and claims, and verify HS256/384/512 signatures with Web Crypto.
Open tool →Dev toolURL Encode/Decode
Encode, decode, and parse queries.
Percent-encode strings, decode safely, and break a URL into parts and query params.
Open tool →Dev toolHash Generator
MD5, SHA-1, SHA-256, SHA-384, SHA-512.
Hash text or files with common digests. SHA family via Web Crypto; MD5 via a local implementation.
Open tool →Dev toolUUID Generator
v4, v7, and Nano IDs in bulk.
Generate UUIDs and compact Nano IDs locally, one or many at a time.
Open tool →Dev toolRegex Tester
Live matching, groups, and replace.
Test JavaScript regular expressions with live highlights, capture groups, and replace preview.
Open tool →Dev toolDiff Checker
Compare two texts side-by-side.
Line-level diff of two texts with added, removed, and unchanged rows — computed locally.
Open tool →Dev toolTimestamp Converter
Unix, ISO, and local time.
Convert between Unix seconds/millis and ISO strings, with live “now” and relative labels.
Open tool →Dev toolColor Converter
Formats and contrast checks.
Convert HEX, RGB, and HSL, and check WCAG contrast between foreground and background.
Open tool →Dev toolQR Code Generator
Text or URL to QR — SVG/PNG.
Generate a QR code from text or a URL and download SVG or PNG — entirely offline.
Open tool →Dev toolCron Helper
Explain and preview cron expressions.
Paste a cron expression for a plain-English explanation and upcoming run times.
Open tool →Dev toolPassword Generator
Strong random passwords, locally.
Generate passwords or passphrases with crypto-quality randomness — nothing is sent anywhere.
Open tool →Dev toolPassword Strength
Entropy and crack-time with zxcvbn.
Estimate password strength, crack time, and feedback using the zxcvbn model — offline.
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