Free Online Tools
for Everyone
Access powerful utilities for developers, creators, students, and businesses. Everything runs instantly, securely, and completely free.
$ curl -X POST https://api.toolbox4u.in/v1/qr-generator \
-H "Content-Type: application/json" \
-d '{"data": "https://toolbox4u.in"}'
# Output response
{
"success": true,
"qrCodeUrl": "https://cdn.toolbox4u.in/qr/gen_8f8fa2.png"
}
Discover Our Utilities
Explore a vast library of client-side web applications and developer resources built to save you time.
JSON Formatter
Beautify, validate, and minify your JSON data with instant syntax highlighting.
QR Code Generator
Generate high-quality customizable QR codes for text, URLs, Wi-Fi, or contacts.
IP Lookup
Trace your IP or any other IP address to find country, region, city, and ISP.
URL Shortener
Create short, clean, and memorable links with clicks tracking and analytics.
PDF Tools
Merge, split, compress, and convert PDF documents easily in your browser.
Image Converter
Convert images to PNG, JPG, WebP, SVG, and other formats with speed.
Color Picker
Pick colors, convert formats (HEX, RGB, HSL), and generate complementary palettes.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly from your text.
Base64 Encoder
Encode text or files into Base64 format and decode Base64 back to plain format.
Unit Converter
Convert between different units of measurement for length, weight, area, and temperature.
Maps & Geo Tools
Find coordinate conversions, distance calculations, and interactive map utilities.
AI Tools
Leverage artificial intelligence for copywriting, text summarization, and smart edits.
Why Choose Toolbox4U?
We build utilities with a focus on ease-of-use, performance, and confidentiality.
Fast
Engineered for speed. Almost all computations run locally in your browser for instant results.
Free
Every single utility is completely free. No hidden paywalls, limits, or subscriptions.
Secure
Your privacy is paramount. Your data is processed client-side and never saved on our servers.
No Registration Required
Skip the signup forms. Instant access to all tool categories without creating an account.
Integrate Utilities
Into Your Applications
Every tool on Toolbox4U is backed by a production-ready, globally distributed REST API hosted at api.toolbox4u.in.
- ✓Free tiers for developers and open source
- ✓Low latency global edge caching
- ✓Comprehensive CORS support for client integration
curl -X POST https://api.toolbox4u.in/v1/qr-generator \
-H "Content-Type: application/json" \
-d '{"data": "https://toolbox4u.in", "size": 300}'