Everyday tools that never see your files
UsefulCrate is a collection of 18 free browser-based utilities for images, text and code. Every tool runs entirely in your browser, so files and text are never uploaded to a server — no accounts, no queues, no waiting for a round trip.
Image Compressor
Shrink JPG, PNG and WebP files with adjustable quality.
Image Converter
Convert between WebP, JPEG and PNG, in batches.
Image Resizer
Scale images to a maximum width and height, in batches.
Word & Character Counter
Live word, character, sentence and reading-time counts.
Text Cleaner
Deduplicate, trim and sort lines of text.
Case Converter
camelCase, snake_case, kebab-case and five more, at once.
Slug Generator
Turn a title into a clean, SEO-friendly URL slug.
JSON Formatter & Validator
Format, validate and minify JSON with clear error messages.
Base64 Encoder & Decoder
Encode and decode text as Base64, UTF-8 safe.
URL Encoder & Decoder
Percent-encode or decode URLs and query strings.
JWT Decoder
Read a JWT's header and payload, with readable expiry.
Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests.
UUID Generator
Generate random v4 UUIDs, one or hundreds at a time.
Unix Timestamp Converter
Convert Unix timestamps to dates and back, both directions.
CSV to JSON Converter
Turn CSV, TSV or delimited data into JSON.
Password Generator
Strong random passwords, generated and shown locally only.
Colour Converter
Convert HEX, RGB and HSL values with a live preview.
Lorem Ipsum Generator
Placeholder text by paragraph, sentence or word count.
Why locally matters
The usual alternative is a website that asks you to upload your file first. That is a copy of your document on somebody else's machine, under terms you probably have not read. Here there is no upload step to trust, because there is no upload code at all. Everything below is plain JavaScript running in this tab:
- Private by construction. Not by promise — there is no code path that sends your file anywhere.
- Fast. No upload, no queue, no download wait. The limit is your own machine.
- Works offline. Once the page has loaded, the tools keep working even if your connection drops.
- No account. No sign-up, no email address, no password.
Questions
Are my files really not uploaded?
Correct. Every tool is plain JavaScript running in your browser tab. There is no upload endpoint, no background job and no queue. Open your browser's developer tools, switch to the Network tab, and use any tool — you will not see a request carrying your file.
Is there a cost or a file limit?
No cost and no account. There is no limit imposed by us, because nothing is sent to us. The practical limit is your own machine's memory.
How is the site paid for?
By advertising. Ads are served by third-party networks and use cookies, which the Privacy Policy describes in full. Blocking advertising cookies does not affect any of the tools.
Can I request a tool that is not here?
Yes — the contact page explains how. Tools that can run entirely in the browser are the ones we can build.