Blog
Guides and tips for working with PDFs, images, and documents — all for free in your browser.
How to Generate a QR Code Online for Free — No Upload, No Login
Generate QR codes from any URL or text in your browser with ToolMint. Pick size, error-correction level, custom colours; download as PNG or SVG. Nothing leaves your device — the QR payload is never uploaded to a server.
Best Free PDF OCR Tool — Make Scanned PDFs Searchable
Learn how to use OCR to make scanned PDFs searchable and copy-pasteable for free using ToolMint. Powered by Tesseract, processed server-side and deleted within 1 hour.
How to Add a Watermark to a PDF for Free
Learn how to add text or image watermarks to any PDF for free using ToolMint's in-browser watermark tool. No upload, no signup — your file never leaves your browser.
How to Decode a JWT Token Online — Step-by-Step Guide
Learn how to decode a JWT token online to inspect its header, payload, and claims. Understand the structure, common fields, and security warnings every developer should know.
How to Generate a UUID Online — UUID v4 Generator
Learn how to generate a UUID online instantly using ToolMint's free UUID v4 generator. Understand what UUIDs are, when to use them, format options, and how they compare to alternatives like ULID and nanoid.
How to Merge PDF Files Online for Free (No Signup)
Learn how to combine multiple PDF files into one document instantly using ToolMint's free online PDF merger. No signup, no upload — everything happens in your browser.
10 Best Free Online Developer Tools: JSON Formatter, Base64, UUID & More
A roundup of the best free online developer utilities — JSON formatter, Base64 encoder, UUID generator, hash calculator, JWT decoder, regex tester, and more. All private, no signup.
How to Password Protect a PDF Online (Free, No Upload)
Protect your PDF with a password directly in your browser. No file upload, no signup, no server — ToolMint encrypts your document client-side for maximum privacy.
How to Convert Images Between JPEG, PNG & WebP Online
Convert images between JPEG, PNG, WebP, AVIF, and BMP formats instantly in your browser. Free, private, and no quality loss — powered by ToolMint's Image Studio.
How to Split a PDF and Extract Pages Online for Free
Split PDF files and extract specific pages instantly in your browser. Free, no signup, no upload — ToolMint processes everything client-side for maximum privacy.
10 Free Developer Tools Every Programmer Needs in Their Toolkit
JSON formatters, Base64 encoders, regex testers, and more — all in your browser with no installation.
How to Compress PDF Files Online Without Losing Quality
Learn how to reduce PDF file size for free. No signup needed — your files stay on your device.
Best Free Online Image Editor: Crop, Resize, Compress & More
Edit images for free in your browser — crop, resize, rotate, add filters, text, watermarks, and compress. No signup needed.
Privacy-First File Tools: Process Files Without Uploading
ToolMint processes your files right on your device. No uploads, no signup — here's what that means for you.
The Complete Guide to Free Online PDF Tools
Everything you can do with PDFs online for free — merge, split, compress, rotate, protect, watermark, OCR, and more.