10 free online utility tools you'll actually use in 2026
The internet is full of tool sites that bury a one-line utility under ten popups and a newsletter prompt. Here are ten tools that just work — no signup, no tracking, no nonsense. Every one of them runs entirely in your browser.
1. JSON formatter
If you work with APIs, you'll reach for this weekly. Paste an unreadable blob of JSON and get it pretty-printed, minified, or validated. Useful in debugging sessions, log-reading, or when a webhook ships a payload you didn't expect. Try the JSON formatter.
2. Password generator
Stop reusing passwords. A good password generator lets you tune length and character sets, and uses a cryptographically-secure random source. See also how to generate strong passwords.
3. UUID generator
When you need a unique identifier for a test record, a filename, or a database row, a UUID v4 generator is the quickest way. Bulk-generate hundreds at once if you're seeding a dev database.
4. Unix timestamp converter
Debugging logs across timezones is a pain. A timestamp converter flips between seconds, milliseconds, and human-readable dates instantly — both local and UTC.
5. Base64 encoder/decoder
You'll meet Base64 in JWTs, email attachments, data URIs, and configuration files. A simple Base64 tool decodes it all instantly.
6. Hash generator
Need a SHA-256 of a string for a checksum or a cache key? The hash generator computes SHA-1 through SHA-512 live as you type, using your browser's built-in Web Crypto API.
7. Regex tester
Writing a regex is usually a three-step loop: write, test, despair. A regex tester with live match highlighting and capture group inspection tightens the loop to seconds.
8. CV maker
A free CV maker with clean templates beats most paid options. Fill the form, switch templates, and print to PDF. Your data never leaves the page.
9. Budget calculator
A simple income/expense tracker with print-to-PDF is perfect for a monthly review or for sharing a household plan on paper.
10. Text counter
Writing a Twitter post, a meta description, or a short essay with a word limit? The text counter gives you characters, words, sentences, reading time, and UTF-8 byte counts at a glance.
Why browser-only tools?
When a tool runs in your browser, your data never leaves your device. That's important for anything sensitive — tokens, passwords, resumes, budgets. It's also faster, since there's no network round-trip, and it works offline once the page is loaded.