Flat vs Reducing Rate: How EMI Really Works
Why two loan quotes with the same headline rate can cost very different amounts: how flat and reducing-balance rates convert, where each EMI goes, and what prepaying changes.
Related tool: EMI Calculator
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Percentage Calculator
Find what X% of a number is, or what percentage one number is of another.
Unit Converter
Convert between common units of length, weight, volume, area, speed, and temperature.
PDF to Image Converter
Convert each page of a PDF into a downloadable PNG image.
Image Compressor
Reduce a JPEG or PNG's file size by adjusting quality, with a live before/after comparison.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON, with the exact parse error if it's invalid.
EMI Calculator
Monthly loan installment, total interest, and a full repayment schedule.
BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight, and see which general weight category it falls into.
QR Code Generator
Turn any text or URL into a scannable QR code you can download as an image.
Word & Character Counter
Count words, characters, sentences, and estimated reading time as you type.
Password Generator
Generate a strong, random password with adjustable length and character types.
PDF to Word Converter
Extract a PDF's real, selectable text into a genuine .docx file.
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Guides
All guidesHow to Compress a PDF Without Losing Quality
What actually makes a PDF large, and how to shrink it while keeping text and images looking right.
Related tool: Compress PDF
PNG vs JPG vs WebP: Which Image Format Should You Actually Use?
A plain-language breakdown of when each format genuinely wins, not just a spec-sheet comparison.
Related tool: Image Format Converter
JSON Parse Errors: Common Mistakes and Fixes
The mistakes behind most "invalid JSON" errors, with before-and-after fixes and how to read where the parser gave up.
Related tool: JSON Formatter & Validator
Why WebToolGrid?
Most calculator and tool sites bury a simple task under logins, pop-ups, or bloated downloads. WebToolGrid does the opposite: each tool is a single page that loads fast, works on any device, and explains what it's doing — not just the result itself.
Every calculator page includes the formula it uses and a worked example. Every file tool — PDF, image, or audio — processes your file entirely in your browser, so it is never uploaded to our servers. See our Privacy Policy for the few exceptions and what diagnostic data the site sends. To see how the tools are tested and where the formulas come from, read the About page; the rules for using the tools are in the Terms of Service.
Common questions about WebToolGrid
Is WebToolGrid really free?
Yes. Every calculator and online tool on WebToolGrid is free to use, with no account, sign-up, or install required.
Do you store the numbers or files I use?
No. Calculators run locally in your browser, and PDF, image, audio and video tools process your files on your own device, so your inputs and files are not sent to our servers or stored by us. A few tools rely on a browser or third-party service (for example, Speech to Text uses your browser's speech recognition); the Privacy Policy lists these exceptions.
Are the results accurate enough for financial decisions?
The calculators use standard, widely documented formulas and are accurate for planning purposes, but they are not a substitute for advice from a qualified financial or tax professional. See our Disclaimer for details.
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