The Privacy-First Developer Toolkit
No server uploads. No API keys leaked. 100% Client-side processing for peace of mind.
Developer Utilities
11 toolsUUID Generator
Bulk generate v4 UUIDs
JSON Formatter
Validate & beautify JSON
Code Snap - Beautiful Code Screenshots
The ultimate Carbon alternative for developers. Support Retina export and glassmorphism background.
Cron Generator
Visual cron scheduler
Base64 Converter
Text & Image encoder/decoder
Diff Checker
Compare text differences
Password Generator
Secure random passwords
Unix Timestamp
Convert epoch time to date
Local SQL Analyzer
Analyze CSV/JSON/Parquet files
SQLite Viewer
Debug SQLite files locally
JWT Debugger
Securely decode JWTs offline
Image & Media
8 toolsSmart Compressor
Compress to specific size (MB)
Image Converter
WebP/PNG to JPG converter
HEIC to JPG
Convert iPhone photos to JPG
YouTube Thumbnail
Download 4K thumbnails
QR Code Generator
Customizable QR codes
Screen Recorder
Record screen with no watermarks
Offline Voice Recorder
Record audio locally (WebM)
Audio Converter - Offline Mode
Secure offline audio converter for MP3, WAV, FLAC & RAW
Why Choose KNothing?
Privacy First
Logic runs in your browser. No data is sent to our servers. Your API keys and content are safe.
Offline Capable
PWA enabled. Works without internet. Install it on your device for instant access.
Blazing Fast
Powered by WebAssembly and Nuxt 3 for near-native performance.
Frequently Asked Questions
Is it safe to paste my API keys?
Yes. KNothing is designed to be 100% client-side. We do not have a backend database to store your data. Everything happens in your browser.
Is it free?
Yes, all tools are free to use. The project is open source and community-driven.
Share KNothing
Help us grow by sharing these tools with your developer friends.