Every everyday tool, in one bay.
Fast, free utilities for developers, students and businesses. Most of them run entirely in your browser — so your files are never uploaded, and there is no sign-up, no quota and no watermark.
Runs in your browser
Client-side tools never upload your file. It is processed on your device and never leaves it.
No account, no limits
No sign-up wall, no daily quota, no watermark on anything you make here.
Loads in under a second
Every tool page is statically rendered and served from the edge. Heavy code loads only once you use it.
Browse by division
All tools →Text
15Count it, clean it, compare it, convert it — instantly, in your browser.
Developer
4JSON, Base64, JWT, regex, hashes — the daily utilities, without the ads.
Security
2Passwords, hashes and encryption that never touch a server.
Calculators
1Percentages, dates, ratios and finance — with the working shown.
Start here
The tools people reach for most often.
Password Generator
OfflineStrong passwords from your browser’s cryptographic random source — never sent anywhere.
securityPercentage Calculator
OfflineSix percentage questions, each answered with the formula shown.
calculatorSlug Generator
OfflineTurn any title into a clean, URL-safe slug — one per line, in bulk.
textBase64 Encode / Decode
OfflineEncode and decode Base64 with full Unicode support and URL-safe output.
developerCase Converter
OfflineTwelve cases including camelCase, snake_case and proper Title Case.
textJSON Formatter
OfflineFormat, validate and minify JSON — with errors that point at the line.
developerRemove Duplicate Lines
OfflineStrip repeated lines from a list while keeping the original order.
textURL Encode / Decode
OfflinePercent-encode URLs and query strings, with the right mode for each.
developer
Recently added
Remove Extra Spaces
OfflineStrip extra spaces — and the invisible characters that broke your text in the first place.
textFind and Replace
OfflineRegex, capture groups, and rule chains that run in order — with a guard against patterns that freeze the page.
textCharacter Frequency Counter
OfflineLetter, word and phrase frequency — compared against the English baseline for cipher work.
textLine Numberer
OfflineAdd line numbers — or strip the ones you pasted in by accident.
text
Why “runs in your browser” is not marketing
Most online tools work by uploading your file to a server, processing it there, and sending the result back. That means a copy of your document existed on someone else’s machine, was written to their disk, and passed through their logs.
The tools here marked Offline do the work in your own browser using WebAssembly and the platform’s built-in APIs. There is no upload step, because there is nowhere to upload to. You can verify it: load a tool page, disconnect from the internet, and it keeps working.
Some jobs genuinely need a server — large video transcoding, for instance. Those tools say so on the page, delete your file within two hours, and never log its contents. The privacy policy states exactly which is which.