DevTools
Free online tools for developers
A collection of useful utilities to simplify your development workflow. No signup required. 100% client-side processing.
View on GitHubAvailable Tools
QR Code Generator
Create custom QR codes from text or URLs. Download as PNG or SVG with color options.
QR Scanner
Scan QR codes from camera or upload images. Real-time camera scanning with history.
VietQR Generator
Tạo mã QR thanh toán VietQR và hình nền wallpaper cho ngân hàng Việt Nam.
OCR Scanner
Extract text from images using AI-powered OCR. Supports multiple languages.
Color Picker
Pick colors from any image. Get HEX, RGB, HSL values with magnifier preview.
Markdown Editor
Create and edit markdown with live preview. Export to HTML or download as .md file.
Subdomain Scanner
Discover subdomains using Certificate Transparency logs, resolve DNS, and detect Cloudflare protection.
IP Address Checker
View your public IP address, location, ISP info with interactive map visualization.
Speech to Text
Record audio or upload files to transcribe speech to text using AI.
OTP Generator
Generate TOTP codes with support for saving keys, password protection, and QR code export.
Base64 Image
View Base64 encoded images or convert images to Base64 strings with drag & drop.
Webhook Tester
Receive and inspect webhook requests in real-time from any service.
JSON Server
Host, validate, and share JSON data. Create mock APIs with persistent storage.
JSON Viewer
View, format, and explore JSON data with tree view, syntax highlighting, and path navigation.
Image Uploader
Upload images and get shareable links. Drag & drop or paste from clipboard.
File Transfer
Share any file with download link. Like WeTransfer, but simpler.
YouTube Downloader
Download YouTube videos and audio in various qualities.
Time Capsule
Upload files and lock them for a set time. Download only after the unlock date.
ANeko Builder
Create custom skins for ANeko Reborn Android pet app with visual animation editor.
Community Chat
Real-time anonymous chat with other developers. No signup required.
Video Player
Play local video files in your browser. Drag & drop, no upload needed.
Audio Player
Play local audio with playlist support. Shuffle, loop, visualizer.
Stream Player
Play HLS and DASH streams. Adaptive bitrate, quality selector.
M3U8 Downloader
Download HLS/M3U8 video streams. Convert to MP4 with ffmpeg.
Fast & Free
All tools are free to use with no rate limits
Privacy First
Data stays in your browser, nothing sent to servers
Mobile Ready
Works on any device with a modern browser