About OpenTool
OpenTool is a small, personal collection of web tools that we actually use ourselves. There’s no account to create, no tracking, and nothing to install — you open a tool and it does the job. Most of it runs right in your browser so your files stay on your device, and the handful of tools that need a server erase your file the moment they’re done.
Your files stay put
Most tools work entirely in your browser, so your files never get uploaded anywhere. The few that do need a server delete them as soon as the job finishes.
Free, without the catch
No accounts, no usage limits, no watermarks on your files. A few ads keep the lights on — that’s the whole arrangement.
Serious about the tech
Built on modern web standards — PDF.js, WebAssembly, Web Workers, and models that run on your device rather than phoning home.
What you’ll find here
PDF Tools
Merge, split, compress, edit and convert PDF files
Image Tools
Resize, compress, edit and convert images
Convert
Convert Word, Excel, PowerPoint and HTML files to PDF
Utility Tools
QR codes, barcodes, compression and converters
Resume & Documents
Resume, CV, biodata and profile template makers
Unit Converters
Convert length, weight, volume, temperature and 150+ units
Date & Time
Age, date difference, time zones and countdown calculators
Typing Tests
Practice typing in English and regional Indian languages with WPM, CPM and accuracy scoring
Health & Fitness
BMI, calorie, heart rate and workout calculators
Govt Exam Toolkit
Exam photo & signature resizer, PDF compressor, background fixer and more — preset for UPSC, SSC, IBPS, RRB, NEET, JEE
Calculators
Finance, math, health, date, unit and computer calculators
Developer Tools
JSON, regex, JWT, hash and code utilities
Finance
EMI, loan, savings, retirement and business calculators
Computer & IT
Number base, hash, storage, bandwidth and network calculators
Math
Scientific, algebra, number theory and matrix calculators
Text Tools
Word counters, case converters, text to handwriting and reading aids