QR Code Generator
Generate a QR code from text or a URL, download as PNG or SVG.
Base64 Encode/Decode
Encode or decode Base64 text, handles UTF-8 and files.
JWT Decoder
Decode a JWT header and payload, check expiry.
JSON Formatter
Format, minify, and validate JSON with error locations.
UUID Generator
Generate v4 UUIDs in bulk.
Timestamp Converter
Convert between Unix, ISO, and local time.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 of text.
URL Encoder & Query Parser
Encode/decode URI components, parse query strings.
Link Shortener
Create and manage short links backed by Redis.
Sushi Bill Splitter
Split a conveyor-belt sushi bill by plate colour and count.
Time Zone Converter
Convert an instant across zones and see the hour overlap at a glance.
PromptPay QR Generator
Generate a Thai PromptPay QR from a phone number, ID, or e-Wallet ID.