Developer Tools That
Respect Your Privacy
Format JSON, generate passwords, test regex, build cron expressions, diff text, decode JWTs — all without sending a single byte to a server.
All Tools
18 Free Developer Tools
JSON Formatter
Format, validate, and minify JSON data instantly
JSON to TypeScript
Generate TypeScript interfaces from any JSON
Base64 Encode/Decode
Encode and decode Base64 strings instantly
URL Encoder/Decoder
Encode or decode URLs and query parameters
HTML Entity Encoder
Encode special characters to HTML entities
UUID Generator
Generate cryptographically random UUIDs v4
Password Generator
Secure random passwords with strength meter
Lorem Ipsum Generator
Placeholder text for designs and mockups
Word Counter
Count words, characters, sentences, reading time
Diff Checker
Compare two text blocks line by line
Regex Tester
Test regex patterns with live highlighting
Markdown Preview
Live side-by-side Markdown to HTML preview
Color Converter
Convert between HEX, RGB, and HSL formats
CSS Minifier
Minify or beautify CSS with size savings
Cron Builder
Visual cron schedule builder with next runs
Unix Timestamp
Convert timestamps to human-readable dates
Hash Generator
SHA-256, SHA-384, SHA-512 hash generation
JWT Decoder
Decode and inspect JSON Web Tokens
20 free uses per day · Unlimited with Pro
Why QuickTools
Built for how developers actually work
Zero Server Calls
Every tool runs 100% in your browser using native JavaScript APIs. No data ever leaves your device.
Instant Results
No loading spinners, no API rate limits, no signup walls. Open a tool and start working immediately.
Works Offline
After the first visit, all tools work without an internet connection. Reliable in any environment.
Pro Plan
Need Unlimited Access?
Free accounts get 20 uses per day. Pro unlocks unlimited access to all 18 tools for $4.99/month.
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