Smart utilities for modern work

Everyday tools.
Built better.

Practical utilities for writing, files, images, data, and daily calculations. No account required. Most work stays in your browser; tools that contact an external service say so before you use them.

154 focused utilities Local-first processing No account required
Start here

A short list of dependable utilities we use ourselves.

01

JSON Formatter

Validate an API response, find a syntax error, and turn compact JSON into something readable.

Open formatter → 02

Image Compressor

Compare file sizes as you tune quality. Your source image stays on your device.

Compress an image → 03

Text Compare

See additions and removals clearly before you publish, send, or merge a revision.

Compare text →
The library

Find the right tool

Browse by category or search by the job you need to finish.

How we build

Small software should still feel considered.

01

Clear before clever

Each tool is designed around one job, with readable labels, sensible defaults, and an explanation of what happens to your input.

02

Private where possible

Text and file tools generally run on your device. Network lookups need an external request and identify that dependency on the page.

03

Tested in real browsers

We check the core workflow, keyboard use, mobile layout, empty states, and downloads before a tool joins the library.

Built and maintained independently. thisuseful began as a personal set of utilities for repetitive work. The public library grows when a tool solves a specific problem well—not simply to increase the page count.

Read how the site is maintained →