jsontools
JSON FormatterJSON DiffJSON Tree ViewerJSON Graph Viewer
CSV ↔ JSONXML ↔ JSONYAML ↔ JSONExcel ↔ JSONTOML ↔ JSON
JSON → TypeScript / ZodJSON → Schema
Text Case ConverterCSS MinifierHTML MinifierJavaScript MinifierSVG OptimizerSVG to JSXSQL FormatterGraphQL FormatterURL Encoder / DecoderBase64 Encoder / DecoderString Escaper / UnescaperMarkdown Preview
JWT DecoderJWT GeneratorHash GeneratorHMAC GeneratorUUID GeneratorPassword Generator
Regex TesterCron ParserUnix TimestampNumber Base ConverterGPT Token CounterColor PickerCSS Gradient GeneratorOpen Graph Meta Tag GeneratorCSS Box-Shadow Generator
Guides
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Contact

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Email

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Bug reports & feature requests

If you found a bug or have an idea for a new tool, opening a GitHub issue is often faster than email. It's public, so I can track it and you can follow the status.

Open an issue on GitHub

About the project

Curious why JSON Tools exists or how it works? Read the About page →

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jsontools

Free developer tools.
No signup, no tracking, no nonsense.

JSONJSON FormatterJSON DiffJSON Tree ViewerJSON Graph Viewer
ConvertersCSV ↔ JSONXML ↔ JSONYAML ↔ JSONExcel ↔ JSONTOML ↔ JSONJSON → TypeScript / ZodJSON → Schema
Text & CodeText Case ConverterCSS MinifierHTML MinifierJavaScript MinifierSVG OptimizerSVG to JSXSQL FormatterGraphQL FormatterURL Encoder / DecoderBase64 Encoder / DecoderString Escaper / UnescaperMarkdown Preview
SecurityJWT DecoderJWT GeneratorHash GeneratorHMAC GeneratorUUID GeneratorPassword Generator
Dev UtilsRegex TesterCron ParserUnix TimestampNumber Base ConverterGPT Token CounterColor PickerCSS Gradient GeneratorOpen Graph Meta Tag GeneratorCSS Box-Shadow Generator
Guides
What is JSON?Is Your JSON Valid? How to Validate ItJSON Best PracticesWhat is CSV?What is XML?What is YAML?What is TOML?JSON vs YAML: What's the Difference?What is JSON Schema?What is URL Encoding?What is Base64 Encoding?What is Markdown?Markdown CheatsheetSQL CheatsheetWhat is SVG?What is GraphQL?What is a JWT (JSON Web Token)?What is a Hash Function?What is HMAC?Encoding vs Encryption vs HashingWhat is a UUID?Password Strength and Entropy ExplainedWhat is a Regular Expression?Regex CheatsheetCron Expression ExamplesWhat is a Unix Timestamp?Understanding Number BasesHEX, RGB, and HSL ExplainedWhat is Open Graph?What is Minification?What is a Token? LLM Tokenization ExplainedJSON Mode & Structured Outputs: Reliable JSON from LLMs
JSON
JSON FormatterJSON DiffJSON Tree ViewerJSON Graph Viewer
Converters
CSV ↔ JSONXML ↔ JSONYAML ↔ JSONExcel ↔ JSONTOML ↔ JSONJSON → TypeScript / ZodJSON → Schema
Text & Code
Text Case ConverterCSS MinifierHTML MinifierJavaScript MinifierSVG OptimizerSVG to JSXSQL FormatterGraphQL FormatterURL Encoder / DecoderBase64 Encoder / DecoderString Escaper / UnescaperMarkdown Preview
Security
JWT DecoderJWT GeneratorHash GeneratorHMAC GeneratorUUID GeneratorPassword Generator
Dev Utils
Regex TesterCron ParserUnix TimestampNumber Base ConverterGPT Token CounterColor PickerCSS Gradient GeneratorOpen Graph Meta Tag GeneratorCSS Box-Shadow Generator
Guides
What is JSON?Is Your JSON Valid? How to Validate ItJSON Best PracticesWhat is CSV?What is XML?What is YAML?What is TOML?JSON vs YAML: What's the Difference?What is JSON Schema?What is URL Encoding?What is Base64 Encoding?What is Markdown?Markdown CheatsheetSQL CheatsheetWhat is SVG?What is GraphQL?What is a JWT (JSON Web Token)?What is a Hash Function?What is HMAC?Encoding vs Encryption vs HashingWhat is a UUID?Password Strength and Entropy ExplainedWhat is a Regular Expression?Regex CheatsheetCron Expression ExamplesWhat is a Unix Timestamp?Understanding Number BasesHEX, RGB, and HSL ExplainedWhat is Open Graph?What is Minification?What is a Token? LLM Tokenization ExplainedJSON Mode & Structured Outputs: Reliable JSON from LLMs
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