UsefulShelf / Developer Tools

Developer Tools

Format code, convert data, and compare changes. Start your next development task.

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01

Format code and data

Make data readable, check formatting, and compare changes.

JSON Formatter WorkbenchFormat, validate, query, compare, and convert JSON data

Code FormatterBeautify JS, TS, CSS, HTML, JSON code

Text CompareCompare Two Texts Line by Line

Markdown PreviewPreview Markdown and copy HTML

Mermaid to PNG/SVGConvert Mermaid diagrams to SVG/PNG images

YAML ConverterYAML/JSON Data Converter

02

Encode, parse, and debug

Convert encodings, inspect URLs and tokens, and test matching rules.

Base64 ConvertText/Image/File Base64 encode and decode

Regex testTest and debug regular expressions

URL EncodeURL Encode/Decode Converter

JWT ParserParse JWT Header and Payload

URL ParserParse URL structure and query parameters

HTML Entity ConverterHTML Special Character Entity Encoding and Decoding

03

Generate and verify

Generate IDs and passwords, verify content, and check schedules.

Timestamp conversionConvert between timestamp and datetime

Password generatorGenerate secure random password

Hash CalculationCalculate SHA-1, SHA-256, SHA-512 hash for text/file

UUID GeneratorBatch generate UUID v4 identifiers

Cron ParserParse Cron expressions and preview execution times

Random StringBatch generate random strings, tokens, and codes

UTM BuilderGenerate tracking link with source, medium and campaign parameters