Your data stays yours
Almost every tool here runs entirely in your browser. What you paste is processed on your own device and never reaches us — you can confirm it in your network tab.
Small tools that respect your time and your data
API URL Kit is a growing hub of single-purpose mini apps — converters, calculators, formatters, generators and inspectors. They are free, they need no account, and nearly all of them run entirely inside your browser.
12 tools you can use now
9 categories
24 sub-categories
0 accounts required
What this is
Most small jobs on the web — resizing an image, splitting a bill, checking what a photo gives away, formatting some JSON — should take about fifteen seconds. In practice they take five minutes, because the first result you click wants an account, buries the tool under three screens of advertising, or asks you to upload a file that never needed to leave your machine.
API URL Kit exists to be the boring, fast alternative. Every tool is a single page that does one thing, starts working the moment it loads, and is free to use without signing in. It began as one utility for pulling clean URLs out of API responses; that tool is still here, but it is now one of many, and the collection has grown well beyond developer tooling into everyday jobs anyone might need.
What we care about
No signup, no paywall
No account, no email address, no trial. Open a tool and use it. Nothing is held back behind a login.
One tool, one page
Each tool does a single job and sits at the top of its own page. No wizard, no dashboard, no hunting through a menu for the thing you came for.
Honest about the exceptions
A few jobs genuinely need a server. Those tools say so on their own page, state what happens to your file, and are kept out of the private tools list.
What's inside
12 tools are live across 9 categories. Groups with nothing live yet are being worked through — the catalogue lists what is planned so you can see whether the thing you need is coming.
Developer
Utilities for working with APIs, data formats, encoding and the web platform.
6 tools
Featured: API URL Extractor
Calculators
Everyday maths, unit conversion, dates and health metrics you keep redoing.
2 tools
Featured: Age Calculator
Image
Convert, resize, compress and inspect images — without uploading them anywhere.
1 tool
Featured: EXIF Remover
Productivity
Lists, planning and generators that keep work moving.
1 tool
Featured: Checklist Tracker
Text
Compare, transform, clean and analyse text of any size.
1 tool
Featured: Diff Checker
Good places to start
API URL Extractor
Unescape, extract, validate, filter and preview URLs from JSON, REST, GraphQL, Postman and Insomnia API responses.
Data & URLs
Checklist Tracker
Turn Markdown or JSON into interactive project checklists with progress tracking, multiple lists, and one-click export.
Lists & Planning
EXIF Remover
See the hidden metadata in a photo — including where it was taken — and download a clean copy without it.
Edit & Optimise
How your data is handled
Tools that run in your browser never send what you paste anywhere. That is not a promise you have to take on trust: open your browser's network tab while you use one and you will see no request carrying your input. Every such tool is listed on the private tools page and carries a Runs in your browser label.
Some jobs cannot be done that way — they need more memory, more time, or a model too large to ship to your device. Those tools are labelled Processed on our server and state in plain words what happens to your file. Anything uploaded to one is deleted within an hour, usually sooner, and is never logged or used for training. The full detail is in our privacy policy.
We would rather lose a feature than weaken this. Where a
convenience would mean handling your data less carefully, we drop the convenience —
the age calculator has no shareable result links precisely because a URL containing
a date of birth would leak into analytics and referrer headers.
Where it's going
New tools are added regularly, and the aim is a broad catalogue covering the small jobs people actually search for — images, files, text, calculations, everyday conversions — rather than going ever deeper into one niche. Tools marked coming soon have a page and a description but no working interface yet; they are the queue, published openly rather than hidden.
Requests are genuinely useful in deciding what gets built next. If a tool you need is missing, or one that exists gets something wrong, tell us.