Guides & Tips
Practical how-tos for PDFs, finance and developer tools — all free, and all done privately in your browser.
The Best Free PDF Tools in 2026 (No Upload Needed)
The PDF tasks you actually need — and free, private, browser-based tools for each.
7 min read
JWT Explained: How JSON Web Tokens Work
Header, payload and signature — what a JWT is, how it works and how to read one safely.
6 min read
UUID Explained: Versions, Uses and When to Use One
What UUIDs are, the difference between v1 and v4, and how they compare to NanoID.
5 min read
JSON Formatter vs Validator: What’s the Difference?
Formatting makes JSON readable; validating checks it’s correct. When you need each.
4 min read
PNG vs JPG: Which Image Format Should You Use?
Lossy vs lossless, transparency and file size — when to use each, and where WebP fits in.
4 min read
SHA-256 vs SHA-512: What’s the Difference?
Output size, speed and security compared — and which SHA-2 hash to use when.
5 min read
Merge vs Split PDF: When to Use Each
Combine files or break one apart — plus how Split differs from Extract Pages.
4 min read
Base64 Encode vs Decode: What’s the Difference?
What encoding and decoding do, where Base64 is used, and why it is not encryption.
4 min read
How to Sign a PDF Online for Free (Without Uploading It)
Add your signature, text and dates to any PDF in your browser — no upload, no software.
4 min read
How to Fill Out a PDF Form Online for Free (No Printing)
Type into any PDF form, tick boxes, add dates and sign — even on flat, non-interactive PDFs.
4 min read
How to Convert PDF to Word Free (Editable .docx)
Turn a PDF into an editable Word document in your browser — and what it can and can’t preserve.
4 min read
How to Calculate EMI on a Loan (Formula + Examples)
The EMI formula explained simply, with worked examples and how tenure and rate change what you pay.
5 min read
How to Compress a PDF to Reduce File Size
Shrink large scans for email and uploads, and understand what actually makes a PDF big.
4 min read
New vs Old Tax Regime (FY 2025-26): Which Saves You More?
A clear comparison of India’s tax regimes — slabs, deductions and how to decide.
6 min read
JSON Formatting, Validating & Minifying: A Practical Guide
Beautify, validate, minify and diff JSON — plus common errors and how to fix them.
6 min read
How to Merge PDF Files for Free (Without Uploading)
Combine several PDFs into one clean file in seconds — privately, right in your browser.
3 min read
How to Split a PDF into Separate Pages
Pull out the exact pages you need from a big PDF, without any software to install.
3 min read
How to Add Page Numbers to a PDF
Number the pages of a report, contract or ebook in a couple of clicks — for free.
3 min read
How to Add a Watermark to a PDF
Stamp CONFIDENTIAL, DRAFT or your name across every page — free and private.
3 min read
How to Delete Pages from a PDF
Remove blank or unwanted pages and keep the rest, without any software.
3 min read
How to Convert JPG to PDF
Turn photos and scans into a clean, shareable PDF — one image per page.
3 min read