System online — 34 instruments — 100% local
A workbench of precise, private tools for the web.
Encode, decode, convert, inspect and generate — from Base64 and JSON to GIFs. Fast, shareable, and processed entirely in your browser.
Text & Encoding
Encode, decode, convert and reshape text
Text Transformer
45+ encoders, case converters and text utilities in one place
Base64 Encode & Decode
Convert text and data to and from Base64 (and Base64URL)
URL Encode & Decode
Percent-encode and decode text for safe use in URLs
HTML Entity Encode & Decode
Escape and unescape HTML special characters
Case Converter
camelCase, snake_case, kebab-case, Title Case and more
Ethereum Address Checksum (EIP-55)
Apply the EIP-55 mixed-case checksum to an Ethereum address
Full-width ↔ Half-width Converter (Zenkaku / Hankaku)
Convert between full-width (全角) and half-width (半角) Japanese & Latin characters
Katakana ↔ Hiragana Converter
Convert Japanese kana between katakana (カタカナ) and hiragana (ひらがな)
Gzip / Deflate Compressor
Compress and decompress text with gzip, zlib and raw deflate
ASCII Table & Character Codes
ASCII reference plus text ⇄ codes in many formats
JSON & Data
Inspect, format and convert structured data
Image & Media
Build GIFs and convert images, locally
GIF Maker
Turn a set of images into an animated GIF — in your browser
Image Converter
Convert and resize images between PNG, JPG and WebP
QR Code & Barcode Scanner
Scan QR codes and barcodes — camera or image, every code at once
CBR / CBZ Comic Reader
Open and read comic book archives right in your browser
TGS Sticker Viewer & Editor
Preview, recolor and convert Telegram stickers — right in your browser
Files & Archives
Pack, unpack and read archives
Crypto & Hashing
Hashes, checksums and tokens
Generators
UUIDs, IDs and mock data
UUID & NanoID Generator
Generate UUID v4, UUID v7 and NanoID in bulk
QR Code Generator
Create QR codes from URLs and text, download PNG or SVG
Password Generator
Strong random passwords and passphrases
Random Generator
Random numbers, strings, bytes, dice and coins
Lucky Draw / Random Picker
Pick random winners from a list
Time & Date
Timestamps, epochs and timezones
Color & Design
Convert and inspect colors
Math & Units
Convert numbers, units and run calculators
Web & Dev
Everyday developer utilities
Runs in your browser
Every tool executes locally. Your text, JSON and images never leave your device.
Shareable by URL
Inputs and settings live in the address bar — copy the link to reproduce any result.
No limits, no accounts
No sign-up, no rate limits, no tracking. Open a tab and get to work.
Missing a tool?
Suggest it — new instruments are added to the bench regularly.