The developer toolbox that lives in your browser
Generate, encode, sign and decode — 15 focused utilities for everyday engineering work. Fast, private, and free.
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All tools
Pick a utility to get started.
UUID Generator
Generate v4 random or v7 time-ordered UUIDs in bulk, and inspect existing ones.
Open toolJSON Formatter
Pretty-print, minify, validate and sort JSON with precise error locations.
Open toolAbbreviation & Naming
Turn business terms into standard abbreviated names for database columns and code, with your team's dictionary.
Open toolBase64 Encode / Decode
UTF-8 safe Base64 and Base64URL conversion for text and files.
Open toolPassword Generator
Cryptographically secure passwords with entropy-based strength scoring.
Open toolHash Generator
MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes and HMACs for text or files, with a verify check.
Open toolEncrypt / Decrypt
Encrypt text with a password (AES-256-GCM), or use raw AES-GCM / CBC / CTR keys and IVs.
Open toolSSL Certificate Toolkit
Generate a private key and CSR, then import, inspect and verify your certificate and export PEM chains or PFX.
Open toolJWT Generator
Sign HS256/384/512 tokens, then decode and verify any JWT.
Open toolJWE Decoder
Inspect JWE headers and decrypt with dir, AES-KW or RSA-OAEP keys.
Open toolLucky Draw
Draw random winners from a list of names or a number range, with a rolling animation and confetti.
Open toolThai Citizen ID Mock
Generate checksum-valid Thai national ID numbers for testing, and validate them.
Open toolDocument to PDF
Convert Word (.docx), Markdown, text and images to PDF — files never leave your browser.
Open toolImage Resize & Crop
Crop, resize, rotate and convert images to PNG, JPEG or WebP — right in your browser.
Open toolHTML/CSS Render
Write HTML and CSS and see it rendered live at mobile, tablet or desktop width.
Open toolPrivate by design
Every tool runs entirely in your browser with the Web Crypto API. Tokens, keys and secrets never leave your device.
Instant results
No sign-up and no round trips. Output updates as you type so you can stay in flow.
Keyboard first
Press Ctrl K anywhere to jump between tools. Copy any result with a single click.