Tools

Format, validate and view JSON data

Format SQL queries with dialect support

Convert between timestamps and datetime

Generate MD5 hash with optional HMAC

Generate SHA256 hash with optional HMAC

Encode/decode text or files to Base64

Convert between Unicode and Chinese

Convert between byte units (B/KB/MB/GB)

Generate UUID v4 in various formats

Encode/decode URL components

Count words, chars, lines and paragraphs

Edit Markdown on the left, preview on the right

Calculate string byte size in UTF-8/16/32

Extract EXIF metadata from images

Compress images with quality control

Generate QR code from text or URL

Generate random passwords and strings

Compare two texts and highlight differences

Encode/decode text with core socialist values

Detect ambient noise level in decibels using microphone

Calculate vehicle fuel/electricity cost per kilometer

Generate simulated license plate numbers for testing and demo