Every developer ends up with the same short list of tiny tools they Google over and over: a JSON formatter, a UUID generator, a Base64 decoder, something to test a regex before it breaks production. trySandbox collects 139 of these into one place — each one running entirely client-side in the browser, no signup, no upload to a server. Below are the ones most people reach for first.
In short: These are small, single-purpose tools — the kind you don’t want to install software for, just open, use, close the tab.
The most-searched tools, and what they’re actually for
1. JSON Formatter
Pretty-prints, validates, and minifies JSON. The single most commonly needed utility for anyone working with APIs — pasting in a minified response and instantly getting readable, indented structure back.
2. UUID Generator
Generates v4 UUIDs/GUIDs in bulk — used constantly for database seeding, test fixtures, and unique identifiers in code.
3. Base64 Encoder/Decoder
UTF-8-safe encoding and decoding of Base64 strings — a near-daily need when working with tokens, embedded images, or API payloads.
4. Password Generator
Cryptographically strong random passwords — one of the highest-search-volume utility tools on the web, for obvious reasons.
5. Hash Generator
MD5, SHA-1, SHA-256 and SHA-512 hashes — used for checksums, verifying file integrity, and basic (non-password) hashing needs.
6. QR Code Generator
Turns any text or URL into a scannable QR code — one of the most consistently searched generator tools across all categories, not just developer-focused ones.
7. JWT Decoder
Decode and inspect JSON Web Tokens without pasting sensitive auth tokens into a random third-party site — since this one runs fully in-browser.
8. Regex Tester
Live-tests regular expressions with capture groups highlighted — regex is notoriously hard to get right on the first try, which keeps this one in constant demand.
9. Unix Timestamp Converter
Converts between Unix time and human-readable dates — a small but frequent need when debugging logs, APIs, or databases.
10. Color Converter
HEX ↔ RGB ↔ HSL with a live picker — a staple for anyone touching CSS or design handoffs.Browse all 139 tools on trySandbox.io →
Why client-side matters here
A meaningful share of these tools involve sensitive input — auth tokens, passwords, hashes, private JSON payloads. Because everything on trySandbox runs locally in the browser rather than being uploaded to a server, nothing you paste in ever leaves the page. That’s a real difference from tools that silently log or cache what you submit.