20 free tools · no sign-up · nothing uploaded

Small tools, properly made.

ToolBench is a workbench of single-purpose online tools — generators, converters, checkers and counters. Every one of them runs entirely in your browser, so the password you generate, the photo you compress and the text you paste never leave your device.

Browse all tools

20tools, all free
0accounts or uploads
100%client-side processing
5categories on the bench

Security

Secrets and identifiers, made properly

SecurityPassword GeneratorStrong random passwords with a live entropy score and one-click copy. SecurityPassphrase GeneratorMemorable multi-word passphrases that are still hard to guess. SecurityHash GeneratorSHA-1, SHA-256, SHA-512 and MD5 hashes of any text, computed locally. SecurityUUID GeneratorRandom version-4 UUIDs, one at a time or fifty at once.

Images

Everyday photo jobs without the upload queue

ImagesImage CompressorShrink JPG and WebP photos and see the saving before you download. ImagesImage ResizerResize any image to exact pixel dimensions, with aspect lock. ImagesImage ConverterConvert between PNG, JPG and WebP in a couple of clicks. ImagesFavicon GeneratorTurn an image or a letter into a complete, ready-to-ship favicon set.

Colour

For designers, developers and the colour-curious

ColourColour StudioPick a colour and get its HEX, RGB and HSL values plus shades and tints. ColourContrast CheckerWCAG contrast ratios with clear AA and AAA pass or fail marks. ColourPalette GeneratorHarmonious five-colour palettes generated from colour theory. ColourGradient GeneratorBuild linear and radial CSS gradients and copy the finished code.

Data

Developer utilities for everyday formats

DataJSON FormatterFormat, validate and minify JSON, with honest error messages. DataJSON to CSVTurn a JSON array into a clean CSV file for spreadsheets. DataBase64 EncoderEncode and decode Base64 without mangling accents or emoji. DataURL EncoderPercent-encode full URLs or single query values, and decode them back.

Text

Writing and wrangling words

TextDiff CheckerCompare two versions of a text and see exactly which lines changed. TextWord CounterWords, characters, sentences and paragraphs, plus reading time. TextCase ConverterUPPER CASE, lower case, Title Case, camelCase, snake_case and more. TextLorem Ipsum GeneratorPlaceholder text by the paragraph, sentence or word.

Built like a tool, not a funnel

Most tool sites treat the tool as bait: the real product is the sign-up form, the upload, or the data you leave behind. ToolBench works the other way round. The tool is the whole product. You arrive, you do the job, you leave — and because everything happens inside your browser, there is no server quietly keeping a copy of what you made.

That design choice has a practical side, too. A password generated on your own machine cannot leak from a database that does not exist. A photo compressed locally cannot turn up in someone else's training set. Privacy here is not a policy page promise; it is what falls out of the architecture. You can prove it to yourself in ten seconds: load any tool, switch your connection off, and watch it keep working.

Every tool page is the same page

Each tool follows one template: the working tool at the top, then a plain-language explanation of what it does, the honest limits of the method, and answers to the questions people actually ask. No countdown timers, no fake download buttons, no maze of ads between you and the result. If a tool cannot do something, the page says so.

The short answers

Are the tools really free?

Yes. Every tool on the bench is free, with no account, no quota and no watermark on anything you download.

Is anything I type or open uploaded?

No. All processing happens in your browser with JavaScript. There is no upload endpoint for the tools to send your data to.

Do the tools work offline?

Once a page has loaded, yes. The calculations are local, so a dropped connection does not stop the work.

Why does every tool live on its own page?

So each page can explain its tool properly and load fast, and so you can bookmark exactly the tool you use every week.

Can I suggest a new tool?

Yes — the contact page is the place. The bench grows by request, and gaps are listed honestly rather than filled with half-finished tools.