JSON
Converter
Toolkit
A collection of fast, private, browser-only converters for developers. Paste JSON, get YAML, CSV, XML, Prisma schemas, SQL — instantly. Transform, encode, decode, and convert data formats without uploading to any server.
All converters
Every tool runs entirely in your browser. Nothing is sent to a server. Click any converter to start transforming your data immediately.
JSON → YAML
Convert JSON to clean YAML and back. Handles nested objects, arrays, and special strings.
JSON → CSV
Turn JSON arrays into CSV spreadsheets and parse CSV back to JSON with type inference.
JSON → XML
Generate well-formed XML from JSON and parse XML tags back to JSON objects.
JSON → PostgreSQL
Generate batch INSERT statements from JSON and parse INSERT SQL back to JSON.
Word Counter
Count words, characters, sentences, and paragraphs in any text. Great for essays and content writing.
UUID to Base64
Encode UUIDs to compact Base64 strings and decode Base64 back to standard UUID format.
URL Encode / Decode
Percent-encode special characters in URLs and decode encoded strings back to plain text.
String to Base64
Encode any string to Base64 and decode Base64 back to its original text instantly.
Remove Duplicate Lines
Paste any text and instantly strip duplicate lines, keeping only unique entries.
Markdown to HTML
Render Markdown to clean HTML and convert HTML tags back to Markdown syntax.
Case Converter
Transform text between camelCase, snake_case, PascalCase, kebab-case, and more.
Date to Unix Timestamp
Convert human-readable dates to Unix timestamps and timestamps back to readable dates.
JSON to Prisma Schema
Generate a full Prisma schema file from a JSON object with inferred field types and models.
JSON to TypeScript Interface
Instantly generate TypeScript interfaces from any JSON payload with nested type support.
JSON Formatter for Large Files
Format or minify JSON files up to 100 MB right in your browser with drag-and-drop upload.
Minify JSON Online
Compress JSON to a single line or beautify it back with one click and instant size savings.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text in a single click.
JWT Decoder
Decode JSON Web Tokens and inspect header, payload, and signature with formatted timestamps.
Color Converter
Convert between HEX, RGB, and HSL with a live preview swatch for CSS and design work.
Regex Tester
Live-highlighting JavaScript regex playground with capture groups, named groups, and match counts.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words with the classic opener option.
Password Generator
Create strong, cryptographically secure passwords with configurable length and character classes.
Text Diff
Compare two blocks of text line by line with added, removed, and unchanged highlighting.
Number Base Converter
Convert integers between binary, octal, decimal, and hexadecimal with BigInt precision.
Cron Expression Parser
Translate any cron expression to plain English and preview the next five executions in your timezone.
cURL to Fetch
Convert any cURL command to idiomatic JavaScript — fetch, axios, or XMLHttpRequest.
JSON Diff
Semantic structural JSON diff ignoring whitespace and key order with dotted path output.
TOML to JSON
Convert between TOML and JSON for Cargo.toml, pyproject.toml, Hugo, and Zola configs.
CIDR Calculator
IPv4 subnet calculator — mask, wildcard, network/broadcast addresses, host range, and classification.
SQL Formatter
Pretty-print SQL queries with configurable indentation and uppercase keywords for Postgres, MySQL, SQLite, MSSQL.
Unix Permissions
chmod calculator — numeric notation (755) ↔ symbolic (rwxr-xr-x) with setuid, setgid, and sticky bit.
CSV to Markdown
Convert CSV, TSV, or semicolon-separated data to GitHub-flavored Markdown tables with aligned columns.
HTML Entity Encoder
Encode HTML entities (named, numeric, hex) and decode entity-encoded strings for safe HTML rendering.
SVG Optimizer
Minify SVG files — strip editor metadata, shorten hex colors, round decimals, collapse whitespace.
Slug Generator
Turn any text into a clean, URL-friendly slug with Cyrillic transliteration and stop-word removal.
ENV Parser
Parse .env files and convert between .env, JSON, and YAML for safe secret management.
URL Decode
Decode percent-encoded URLs and query parameters back to plain text with full Unicode support.
Comprehensive Data Format Conversion Tools
Our JSON Converter Toolkit includes 15+ essential tools for developers, data engineers, and content creators. From JSON format conversions (YAML, CSV, XML) to code generation (Prisma schemas, TypeScript interfaces), we've covered every common data transformation need.
Each converter is designed for speed and reliability. Convert between formats bidirectionally, encode/decode strings, count words, generate database schemas, and manipulate text — all without leaving your browser. Perfect for API development, database migrations, documentation, and daily developer workflows.
Whether you're a full-stack developer, data scientist, or technical writer, our free converter toolkit eliminates the need for multiple specialized tools. Work with JSON, YAML, CSV, XML, SQL, Markdown, Base64, UUID, URLs, timestamps, and more in a single unified platform.
Why use this toolkit?
Instant, no waiting
All conversions run in your browser via pure JavaScript — zero server round-trips, zero latency.
Your data stays yours
Nothing is uploaded anywhere. Paste real API responses, database dumps, or secrets without worry.
Bidirectional by default
Every converter works both ways. Convert JSON → YAML, then flip back with a single click.
Developer-First Features
Multiple Data Formats
Support for JSON, YAML, CSV, XML, SQL, Markdown, Base64, UUID, and more.
Smart Type Inference
Automatic type detection for database schemas, TypeScript interfaces, and data mapping.
No Dependencies
100% client-side JavaScript with no external API calls or server dependencies.
Batch Processing
Handle large files and bulk conversions efficiently in your browser.
Copy & Paste Ready
All outputs are formatted and ready to paste directly into your projects.
Always Free
No premium features, no ads, no paywalls. Everything is completely free forever.
Frequently Asked Questions
Is JSON Converter Toolkit really free?
Yes, 100% free. No sign-ups, no premium tiers, no ads. Our toolkit is completely free forever.
Are my conversions private?
Absolutely. All conversions run in your browser with zero server uploads. Your data stays on your device.
Can I use this offline?
Yes, once loaded, the toolkit works offline. No internet connection required for conversions.
What formats are supported?
We support JSON, YAML, CSV, XML, Prisma schemas, TypeScript interfaces, PostgreSQL, Base64, URLs, Unix timestamps, Markdown, case conversion, and more.
Can I convert large files?
Yes, the toolkit handles large files efficiently. Your browser's capabilities set the limit.
From the blog
Deep-dive guides and cheatsheets that pair with the tools above — format comparisons, security explainers, and reference docs.
JSON vs YAML
When to use each, with examples and the Norway problem.
Understanding JWT
Anatomy, signing algorithms, and the usual mistakes.
Regex Cheatsheet
Classes, flags, groups, lookarounds, and recipes.
chmod Explained
Octal math, special bits, umask, and chown together.
HTML Entities & XSS
Context-aware escaping done right — HTML, URLs, JS, CSS.
SQL Formatting Guide
Readable SQL conventions for code review and incidents.
Start Converting Today
Transform your data formats instantly with our free, privacy-first converter toolkit. No sign-ups, no limits, no server uploads.
Start Converting Now