JSON tools.
Beautifully simple.
Format, convert, and validate JSON — plus Base64, timestamps, and more. Everything runs in your browser.
JSON Tools
Most popularJSON Formatter
Format, beautify, and validate JSON with syntax highlighting.
JSON to CSV
Convert JSON arrays to clean CSV spreadsheet format instantly.
CSV to JSON
Parse CSV files and convert to structured JSON data.
JSON to YAML
Convert JSON to YAML for Kubernetes, Docker, and config files.
YAML to JSON
Convert YAML configuration files to JSON format.
JSON to PDF
Export JSON data as a formatted PDF table for sharing.
Encoding & Utilities
Base64 Encode
Encode text or files to Base64 format for APIs and data URIs.
Base64 Decode
Decode Base64 strings back to plain text or binary.
Unix Timestamp
Convert Unix timestamps to human-readable dates and back.
URL Encode / Decode
Encode and decode URLs for safe web transmission.
JWT Decoder
Inspect JSON Web Token header, payload, claims, and expiry.
JSON Diff
Compare two JSON objects and highlight every change.
Regex Tester
Test regular expressions with real-time match highlighting.
Markdown to HTML
Convert Markdown to HTML with live preview and GFM support.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
JSON Converters
Export & transformJSON to Excel
Export JSON to a real .xlsx file — opens in Excel and Google Sheets.
JSON to SQL
Generate CREATE TABLE and INSERT statements from a JSON array.
JSON to TypeScript
Generate TypeScript interfaces from any JSON object automatically.
JSON Path Tester
Query JSON with dot notation and filter arrays in real time.
TOML ↔ JSON
Convert TOML to JSON and back. For Rust, Hugo, and config files.
More JSON Tools
JSON Minifier
Remove whitespace and compress JSON to reduce file size.
XML to JSON
Convert XML documents to structured JSON output.
JSON to XML
Convert JSON objects to well-formed XML documents.
JSON Escape
Escape and unescape special characters in JSON strings.
JSON Size Analyzer
Analyze JSON structure — size breakdown, depth, key analysis.
CSV to Excel
Convert CSV files to formatted Excel .xlsx spreadsheets.
JSON Schema Validator
Validate JSON against a schema and see detailed error messages.
Why developers choose JSONPro
Private by design
All processing happens inside your browser. Your JSON data never reaches our servers — because we don't have any.
Zero friction
No account, no email, no waiting. Open the tool, paste your data, done. Every tool is one click away.
Built for speed
Plain static files. No JavaScript frameworks. No build pipeline. Loads in under 200ms on any connection.
Always free
No file size limits, no daily limits, no paywalls. Use it as much as you need, whenever you need it.
Popular Guides
From our blogFix "Unexpected Token" in JSON
The 7 most common causes and instant fixes for the most frequent JSON error.
Fix "Unexpected End of JSON Input"
Why your JSON is incomplete and how to fix truncated or empty data.
How to Open a JSON File
Read JSON files on Windows, Mac, browser, or VS Code — no coding needed.
JSON to TypeScript Interface
Type your API responses correctly with nested objects and optional fields.
Read JSON into Pandas
read_json, json_normalize, and fixing the "Expected object or value" error.
All Guides →
37 in-depth tutorials on JSON, APIs, data formats, and developer tools.