TinyTools

Free Online JSON Tools

A comprehensive suite of browser-based JSON utilities for developers. Format, repair, compare, convert, and query JSON payloads privately on your device with zero server uploads.

JSON Developer Tools Cluster

All JSON Tools
JSON Formatter JSON Compare JSONPath Tester & Finder JSON → TypeScript JSON Flattener & Unflattener JSON to JSON Schema Visual JSON Schema Builder Schema Validator Schema Viewer JSON → CSV JSON → YAML JSON → XML JSON → Excel Excel → JSON JSON Minifier JSON Unescape JSON Repair JSON Parser & Tree JSON Escape

Format & Debug

6 Tools

JSON Formatter

Format, validate, repair, minify and explore JSON online. JSON runs locally in your browser with tree view, error detection, copy and download options.

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JSON Minifier

Compress and minify JSON data online. Remove whitespace and line breaks to minimize payload size and save network bandwidth.

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JSON Repair

Detect syntax errors and automatically repair malformed or invalid JSON online. Fix trailing commas, unquoted keys, and single quotes.

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JSON Parser & Tree

Parse, inspect, and navigate JSON data online. Explore objects, arrays, and primitive data types with an interactive tree viewer.

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Schema Validator

Validate JSON data payloads against a JSON Schema online. Instant schema compliance testing and detailed validation error reporting.

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Schema Viewer

Visualize JSON Schema definitions as interactive graphical trees and human-readable documentation online.

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Compare & Query

3 Tools

JSON Compare

Compare two JSON objects side-by-side online. Highlight structural diffs, added keys, deleted values, and modified properties instantly.

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JSONPath Tester & Finder

Test JSONPath expressions online and instantly find matching JSON values. Explore JSONPath syntax, filters, arrays and nested properties in your browser.

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JSON Flattener & Unflattener

Flatten nested JSON into dot notation or unflatten JSON back into nested objects. Free online JSON flattener with custom separators and browser-based processing.

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Converters & Exporters

8 Tools

Excel → JSON

Convert Microsoft Excel (.xlsx/.xls) spreadsheets into clean JSON arrays or objects online. Multi-sheet support with client-side processing.

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JSON → Excel

Convert JSON arrays and nested data into downloadable Microsoft Excel (.xlsx / .csv) spreadsheets directly in your browser.

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JSON → CSV

Convert JSON data arrays and nested JSON objects into clean, tabular CSV files for Excel and spreadsheets instantly.

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JSON → YAML

Convert JSON payloads into clean, readable YAML (YML) format online instantly with custom indentation controls.

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JSON → XML

Convert JSON objects into structured XML documents online instantly. Secure, browser-based JSON to XML conversion.

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JSON → TypeScript

Convert JSON objects into clean TypeScript interfaces and types automatically. Fast browser-based JSON to TS converter.

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JSON to JSON Schema

Convert JSON data into JSON Schema online. Paste a JSON object and automatically infer property types, required fields, arrays, nested objects and schema structure.

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Visual JSON Schema Builder

Build JSON Schema online using a visual schema generator. Add properties, choose data types, mark required fields and generate valid JSON Schema.

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String Encoding & Utilities

2 Tools

JSON Escape

Escape JSON strings for use in JavaScript, Java, Python, and C# source code literals. Handles quotes, backslashes, and newlines.

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JSON Unescape

Unescape JSON strings online. Remove backslashes, unescape quotes, tabs, newlines, and Unicode characters from stringified JSON.

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Why Use TinyTools JSON Utilities?

JSON (JavaScript Object Notation) is the core standard for modern RESTful APIs, cloud microservices, database storage, and client-server communication. TinyTools gives developers an integrated, private, browser-based environment to inspect, repair, transform, and export JSON without installing heavyweight IDE plugins or exposing confidential data to third-party servers.

100% Local Processing

All JSON parsing, formatting, escaping, and conversion happens directly in your browser. Sensitive API tokens and customer data stay on your machine.

Fast Execution

Leverages native JavaScript parsing engines and client-side SheetJS libraries to handle large payloads with zero network latency.

Interlinked Developer Flow

Seamlessly navigate between formatting, unescaping, schema generation, minifying, and Excel conversions with consistent UI controls.

Frequently Asked Questions

Are all JSON developer tools on TinyTools free to use?

Yes, all JSON tools on TinyTools are 100% free with no sign-ups, rate limits, paywalls, or hidden subscriptions.

Is my JSON data kept private and secure?

Yes. Every JSON tool runs 100% locally in your web browser using JavaScript. No payload data is ever uploaded, cached, or transmitted to any remote server.

How do I fix invalid JSON syntax errors?

Use the JSON Repair tool or JSON Formatter. The diagnostic engine detects missing commas, unquoted keys, single quotes, and trailing commas, offering single-click automated fixes.

Can I convert Excel spreadsheets (.xlsx) to JSON and back?

Yes. TinyTools provides both Excel to JSON and JSON to Excel converters. You can convert Excel workbooks (.xlsx, .xls) to clean JSON arrays and download JSON objects directly as styled Excel spreadsheets.

What is the difference between JSON Minifier and JSON Formatter?

JSON Formatter prettifies JSON with clean indentation and line breaks for human readability. JSON Minifier strips all unnecessary whitespace and newlines, reducing payload size for faster network transfer in APIs.

How does JSON string escaping and unescaping work?

JSON Escape turns raw JSON into escaped string literals suitable for JavaScript, Python, Java, or C# strings. JSON Unescape removes backslash escapes from log outputs and API payloads, restoring clean, valid JSON.