The Ultimate Developer Toolbox
A comprehensive suite of online tools designed to streamline your workflow, boost productivity, and simplify complex tasks. All tools are free, secure, and run locally in your browser.
Why Choose QubitTool?
Secure & Private
Your data is your own. All processing is done on your device, ensuring that your files and information never leave your browser.
Comprehensive Toolset
From JSON and PDF utilities to image converters and encoding tools, we offer a wide range of tools to cover all your development needs.
Fast & Efficient
Our tools are optimized for performance, delivering quick results without compromising on accuracy. No sign-up required, just instant access.
How It Works
Choose a Tool
Browse our extensive collection of tools and select the one that fits your needs.
Input Your Data
Upload your file or paste your data into the tool. All processing happens in your browser.
Get Instant Results
Receive the output immediately, ready to be copied or downloaded.
Browse All Tools
JSON Tools
JSON Formatter
Easily format, beautify, and validate your JSON data with our JSON Formatter. Features syntax highlighting and a tree view for clear navigation. Ideal for developers and anyone working with JSON.
JSON Escaper
A free and easy-to-use online tool to escape and unescape JSON strings. It correctly handles special characters, making your JSON data safe to embed within other JSON objects or transmit as a string. Ideal for developers working with APIs and complex data structures.
JSON Diff
Compare two JSON files online with our JSON Diff tool. Easily find differences between two JSON objects, with support for nested objects and arrays. A valuable JSON comparison tool for developers.
PDF Tools
PDF Compressor
Compress PDF files online to reduce their size without losing quality. Our PDF compressor offers various compression levels for optimal file size reduction, making it easy to share and upload documents.
PDF Merger
Merge multiple PDF files into one document online for free. Our PDF merger allows you to combine PDFs easily, reorder pages, and create a single, organized PDF file. No registration required.
PDF Splitter
Split PDF documents into multiple files or extract specific pages with our free online PDF splitter. Easily separate PDF pages, extract pages from PDF, or divide your PDF into custom ranges.
Image to PDF
Easily convert your JPG, PNG, and other images to PDF format with our free online Image to PDF converter. Convert JPG to PDF, PNG to PDF, and more.
Developer Tools
Base64 Encoder/Decoder
Easily encode text and images to Base64 and decode Base64 back. Our free online tool supports UTF-8, image to Base64, and file to Base64 conversions. Fast, secure, and simple to use.
URL Encoder/Decoder
Easily encode and decode URLs with our free online tool. Convert special characters for safe web transmission (percent-encoding) or decode them back to a readable format. Fast, simple, and reliable.
MD5 Hash Generator
Generate MD5 hashes instantly with our free online tool. Supports 32-bit and 16-bit formats (uppercase and lowercase). Perfect for file integrity checks, password hashing, and data verification. Fast, secure, and easy to use.
JWT Generator
Easily generate, decode, and inspect JSON Web Tokens (JWT). Our online tool supports HS256, HS384, and HS512 algorithms for secure token creation and analysis.
Geohash Encoder/Decoder
Encode and decode geohashes, and visualize them on a map.
Timestamp Converter
Instantly convert Unix timestamp to date and date to timestamp. Support for seconds, milliseconds, nanoseconds. View GMT and Local time. The best free online Epoch time converter for developers.
World Clock
Display the current time in multiple cities on a single dashboard.
Unit Converter
Convert between different units of measurement including length, weight, volume, area, temperature, and more.
Base Converter
Convert numbers between different bases including Binary, Octal, Decimal, Hexadecimal, Base32, Base58, and Base62. Supports arbitrary precision conversion.
Regex Tester
Test and debug regular expressions online with real-time highlighting and replacement preview.
XML <-> JSON Converter
Convert XML to JSON and JSON to XML online. Simple, fast, and free tool for developers.
SQL Formatter
Format and beautify SQL queries online. Supports MySQL, PostgreSQL, SQLite, and more.
Image Tools
Image Compressor
Compress image files online with our image compressor. Reduce image size while maintaining good quality. Supports JPEG, PNG, GIF, WEBP and other formats, with batch processing up to 100 images at once.
Image to JPG
Convert various image formats to JPG online with our Image to JPG converter. Convert PNG to JPG, and more.
Image Resizer
Resize images to exact dimensions while maintaining or changing aspect ratio. Free online tool to resize JPG, PNG, and other image formats quickly.
Image Cropper
Crop images to a specific area or aspect ratio
Image Watermark
Easily add text or image watermarks to your photos online. Protect your images with customizable watermarks. No uploads required, completely free and secure.
Image to SVG
Convert any image to a vector-based SVG file.
AI Directory
AI Websites Directory
An authoritative, comprehensive, and continuously updated AI resources directory. It covers global and domestic model providers, open-source ecosystems, research indexes and leaderboards, developer platforms, and curated tool catalogs—helping you quickly discover, compare, and choose the right AI products and references. Supports keyword search and favorites, with clear category sections and an expanding dataset for better experience.
AI Prompt Websites
A structured prompt engineering and inspiration directory: official best practices, community galleries and workflows, open-source lists and tools, marketplaces and template collections. Find high-quality references fast, build reusable prompt patterns, and boost productivity. Supports keyword search and favorites, with clear categories and ongoing expansion of top resources.