开发者工具
Base64、URL 和 HTML 实体编码解码，JSON、YAML、CSV 格式转换，正则表达式和 SQL 工具，Cron 表达式解析，以及哈希、UUID 和密码生成器。粘贴的令牌或配置值只留在你的浏览器中，不会发送到服务器。
此分类暂时还没有中文版工具。下面的英文版用法完全相同。
英文版工具
Base64 Encoder/Decoder
英文A Base64 encoder and decoder that gets Unicode right
Password Generator
英文A random password generator built on the browser's crypto RNG
UUID Generator
英文Create UUID v4 and sortable v7 values in bulk
Hash Generator
英文MD5 and SHA hashes for text and files, computed in the browser
URL Encoder/Decoder
英文A URL percent-encoder and decoder that handles Unicode and emoji
HTML Entity Encoder/Decoder
英文Encode and decode HTML entities for special and non-ASCII characters
JWT Decoder
英文Decode JWT header and payload and check expiry (no signature verification)
JSON Formatter
英文Beautify, minify and validate JSON, sort keys, errors with line and column
JSON to CSV Converter
英文Convert a JSON array of objects to CSV (flattening, delimiters, Excel BOM)
CSV to JSON Converter
英文Convert CSV to JSON (delimiter auto-detect, headers, type conversion, nesting)
JSON to YAML Converter
英文Convert JSON to YAML (indent choice, key sorting, error positions)
YAML to JSON Converter
英文Convert YAML to JSON (safe schema, anchors and merge keys, error line)
SQL Formatter
英文Beautify SQL (MySQL, PostgreSQL and other dialects, keyword case, indentation)
Unix Timestamp Converter
英文Epoch to date and back (seconds to nanoseconds, free-text dates, period start and end, code samples)
Number Base Converter
英文Base 2/8/10/16/36 and custom base conversion with BigInt, negatives and 0x/0b/0o prefixes
Color Converter
英文HEX, RGB, HSL and OKLCH conversion with a preview and WCAG contrast check
Regex Tester
英文JavaScript regex tester with flags, match highlighting, group table and replace preview
Cron Expression Parser
英文Cron expression explainer with 5/6 fields, next 5 runs and time zones
URL Parser
英文URL component breakdown with decoding, IDN hosts and query parameter editing
Charset Converter
英文A converter that re-encodes text and files between Korean, Japanese and Unicode encodings
Mojibake Fixer
英文A tool that repairs mojibake by reversing every likely pair of mixed-up encodings
Unicode Normalizer
英文A Unicode normalization tool for text and file names, including decomposed macOS names
Meta Tag Generator
英文A generator for search and social sharing meta tags with link preview mock-ups
Punycode Converter
英文A converter between Unicode domain names and their xn-- Punycode form