File Tools
Free file tools that run in your browser: verify a file's checksum, convert between formats and sizes, and encode files — all locally, with nothing uploaded.
3 file tools
Checksums, conversions and file utilities.
How-to guides
- How to Zip a File (Compress and Combine)Learn how to zip files and folders on Windows and Mac — to shrink them for email, bundle many files into one, or password-protect a sensitive archive.
- How to Encrypt a File to Keep It PrivateLearn how to encrypt a file so only you can open it — the methods for documents, archives and whole drives, and how to verify a file hasn't been tampered with.
- How to Back Up Your Data (the 3-2-1 Rule)Learn how to back up your files properly with the 3-2-1 rule — three copies, two types of storage, one offsite — so you never lose photos or documents again.
Frequently asked questions
Yes. Every tool is completely free, with no sign-up and no usage limits.
Tools run in your browser wherever possible, so your data stays on your device.
No installation is required — everything works instantly in your web browser.
Related categories
Text Tools
Count, convert, clean and compare text.
Developer Tools
Format, encode, hash and decode.
Finance Calculators
Loans, interest, discounts and tax.
Image Tools
Compress and optimize images privately.
Converters
Convert colors, units, numbers and formats.
Auto Tools
Decode VINs and run the numbers on your vehicle.
PDF Tools
Merge, split, rotate and convert PDFs privately.
SEO Tools
Generate meta tags, robots.txt and analyze content.
Unit Converters
Convert length, weight, speed, data and more.
Math Tools
Percentages, fractions, ratios and more.
Date & Time
Calculate ages, date differences and countdowns.
Health & Fitness
BMI, calories, body fat and more.
Design Tools
CSS gradients, shadows, palettes and more.
Games
Play free classic browser games.
AI Tools
Prompt builders, explainers and text analysers.
Sports & Scoring
Scoreboards and scorekeepers for every game.
Security & Privacy
Passwords, hashes, 2FA and encryption.
Business
Invoices, pricing, ROI and workdays.
Social Media
Captions, hashtags, bios and engagement.
Photography
Depth of field, EXIF, colours and ratios.