Fun and useful web apps — no install, just start.
Write Markdown and see the rendered preview instantly
Free · No install
Instantly turn text into SHA-1/256/384/512 hashes, ready to copy
Convert Unix timestamps ↔ dates in real time, with the current epoch at a glance
Generate standard unique IDs (UUIDs) in bulk — copy in one tap
Turn text, URLs, or contacts into a square 2D barcode — download in one tap
Pretty-print or minify JSON, with exact syntax-error locations
Turn URLs, text, or Wi-Fi info into a QR code instantly — download in one tap
Pull the key color palette from any photo — in your browser, no upload
Real-time HEX/RGB/HSL conversion + auto complementary & analogous palettes
An SSH/SFTP terminal client for Windows, macOS, Linux, iOS and Android 🖥️
Free · Installable
From length to data — convert 100+ units across 12 categories
Convert between JPG, PNG and WebP and auto-fit a target file size — all on your device, no upload 🖼️
Instant text ↔ Base64 — Unicode-safe (Korean, emoji…) with a URL-safe option 🔤
Convert between binary, octal, decimal, hex and any base 2–36 instantly — exact for huge numbers 🔢
From basic arithmetic to trig, logs & powers — a scientific calculator right in your browser 🧮
Test regex live — matches, groups, and replace, right in your browser
Shrink photo size — converted in your browser, no upload
Strong passwords from cryptographic randomness — never sent to a server
