Format, Validate, and Transform JSON Data
The developer-first JSON toolkit trusted by 240,000+ engineers at companies like Stripe, Shopify, and Vercel. Parse, beautify, diff, and convert JSON at the speed of thought — entirely in your browser.
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Trusted by Engineering Teams Worldwide
Built for Developers Who Ship
JSONFlow processes over 18 million JSON documents each month. Our suite of 12 purpose-built tools eliminates the copy-paste cycle between your IDE, API docs, and terminal — so you can validate payloads, transform schemas, and catch errors before they hit production.
240,000+
Active developers using JSONFlow weekly across 140 countries.
18.4M
JSON documents processed last month with zero data retention on our servers.
12 Tools
Format, Validate, Minify, Diff, Convert, Schema, Pointer, Patch, TypeGen, Lint, Merge, and Sort.
99.97%
Uptime over the past 36 months, backed by edge-cached infrastructure.
Core Toolkit
Every JSON Operation You'll Ever Need
From quick formatting in one click to complex JSON Patch generation, each tool is optimized for keyboard-driven workflows with full undo/redo history, clipboard integration, and export to file or API.
JSON Formatter
Beautify minified JSON with configurable indentation (2, 4, or tab), compact mode, and syntax highlighting for keys, strings, numbers, booleans, and null values. Supports payloads up to 50 MB.
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JSON Validator
Validate against RFC 8259 compliance or a custom JSON Schema (Draft 7, 2019-09, 2020-12). Get line-by-line error reports with character offsets and suggested fixes for trailing commas, unquoted keys, and control characters.
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JSON Minifier
Strip whitespace, collapse arrays and objects, and produce the smallest valid JSON string. Compare byte savings side-by-side and export the minified output directly to your clipboard or as a .json file.
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JSON Diff
Compare two JSON trees with color-coded additions, deletions, and modifications. Navigate changes via JSON Pointer paths and generate RFC 6902-compliant JSON Patch operations in one click.
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JSON to / From Converter
Convert JSON to YAML, XML, TOML, CSV, or Python dictionaries and back. Handle nested arrays with configurable delimiters and preserve data types during round-trip conversions.
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JSON Schema Generator
Infer a JSON Schema from sample data with smart type detection, pattern extraction for strings, and enum generation from repeated values. Export as Draft 2020-12 with $ref support.
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Live Editor
Your Workspace, Zero Setup
Paste JSON, hit Enter, and watch the tree render instantly. The editor supports split-pane view, collapsible nodes, copy-by-path, and keyboard shortcuts for every operation. No accounts, no sign-ups — just open and work.
The editor runs entirely client-side using WebAssembly-compiled parsers. Your data never leaves your browser — not even in minified form. That's why security teams at Palantir, Datadog, and GitLab whitelist JSONFlow in their browser policies.
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Why JSONFlow
Features That Save Hours Every Sprint
Client-Side Processing
All parsing, formatting, and validation happens in your browser via a WebAssembly-optimized JSON engine. Zero server uploads means zero risk of sensitive payloads leaking to third-party infrastructure.
JSON Pointer & Path Navigation
Click any node in the tree to copy its JSON Pointer path (e.g., /users/0/address/city). Use paths to extract sub-documents, build patches, or document API response structures with precision.
JSON Patch Generator
Select two versions of a document and generate RFC 6902 patch operations (add, remove, replace, move, copy, test). Copy the patch array directly into your HTTP requests or CI/CD pipelines.
TypeScript Type Generation
Generate TypeScript interfaces and type aliases from JSON data or schemas. Supports optional fields, union types, array generics, and nested discriminated unions out of the box.
Merge & Sort Tools
Deep-merge multiple JSON objects with configurable conflict resolution (last-wins, first-wins, or array concatenation). Sort keys alphabetically, by value type, or by custom comparator functions.
Custom Lint Rules
Enforce team conventions with lint rules: forbid null values, require specific key casing (camelCase, snake_case), limit nesting depth, or flag keys that don't match a regex pattern.
Testimonials
Loved by Developers Who Rely on JSON Daily
Priya Menon — Senior Platform Engineer, Stripe
"We onboard new engineers to our API team and the first bookmark they get is JSONFlow. The Schema Generator alone saved us an afternoon of manual type definitions when we migrated our webhook payloads to Draft 2020-12."
Marcus Webb — DevOps Lead, Datadog
"I use the Diff tool every single day to compare config snapshots across environments. The JSON Patch output integrates directly into our Terraform modules. It's become a critical part of our infrastructure workflow."
Aiko Tanaka — Full-Stack Developer, GitLab
"The fact that everything runs client-side was the deciding factor for our security team. We process internal API responses that contain tokens and secrets — JSONFlow gives us confidence that nothing is ever transmitted."
Frequently Asked Questions
Common Questions From Our Community
Is there a file size limit?
The free tier supports JSON documents up to 50 MB. Our Pro plan, at $9/month, raises that to 200 MB and unlocks batch processing for up to 10 files simultaneously. Most developers never exceed the free limit.
Does JSONFlow store my data?
No. All processing occurs in your browser via client-side WebAssembly. We do not receive, store, or log any JSON payloads. The only server communication is for loading the application itself and optional analytics (which you can disable).
Can I use JSONFlow offline?
Yes. JSONFlow is a Progressive Web App with service worker support. Install it on your desktop or mobile device, and all tools remain fully functional without an internet connection after the initial load.
Which JSON Schema drafts are supported?
JSONFlow supports JSON Schema Draft 7, 2019-09, and 2020-12. The validator highlights version-specific features like $dynamicRef (2020-12) and contains/containsUnique (2019-09) with inline documentation.
Is there a CLI or API?
The JSONFlow CLI (npm install -g @jsonflow/cli) brings formatting, validation, and schema generation to your terminal. A public REST API is available for Pro and Team plans with rate limits of 10,000 requests per hour.
How is JSONFlow different from jsonlint.com?
Beyond validation, JSONFlow offers 11 additional tools including diff, patch generation, schema inference, TypeScript type generation, and multi-format conversion — all in a single unified interface with keyboard shortcuts and offline support.
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Start Working With JSON — Right Now
Open the editor, paste a JSON payload, and experience the fastest JSON toolkit in your browser. No account required. No credit card. No data collection. Just tools that work.
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