Upload .json File
- Instant Formatting
- Interactive Tree View
- 100% Client-side privacy
Paste your JSON code below to start editing:
Supported Image Formats
We support all major image formats like JPG, PNG, WebP, AVIF, BMP, and TIFF so you can work with almost any photo or graphic.
JPG
JPEG (JPG) — The most common compressed format for photos and web images, offering good quality at smaller file sizes.
PNG
PNG — A lossless format with transparency support, ideal for logos, screenshots, and interface graphics.
WebP
WebP — A modern web image format from Google that delivers high quality at significantly smaller sizes than JPEG and PNG.
AVIF
AVIF — A next‑generation format based on the AV1 codec, providing excellent image quality, very small file sizes, and advanced features like HDR.
BMP
BMP — A classic bitmap format often used by older systems and simple raw pixel data workflows.
TIFF
TIFF — A high‑quality, lossless format widely used in professional printing, scanning, and archival imaging.
Syntax Highlighting
Easily inspect key-value structures colorized in visual groups
Interactive Tree
Click nodes to collapse deep nests and easily inspect properties
Private & Safe
Everything runs 100% locally in your browser. No files are uploaded.
Keyboard Shortcuts
Leverage Undo, Redo, Format and Minify hotkeys like a pro
How It Works
Paste or Upload
Drop a JSON file or copy-paste your raw data into the input box
Edit & Format
Clean up your data with Format, or inspect keys visually using Tree mode
Download
Ensure validation checks pass, then download or copy output in one click
Frequently Asked Questions
Everything you need to know
Why Use Our JSON Editor Online?
Syntax Highlighting
Color-coded JSON syntax makes editing and reading JSON easier — keys, strings, numbers colorized
Tree View Navigation
Explore JSON structure visually with collapsible tree view — perfect for large JSON files
Format & Beautify
Instantly format ugly JSON into readable, well-indented structure with one click
Real-time Validation
Automatic JSON validation with line and column numbers for syntax errors
Line Numbers
Navigate large JSON files easily with line numbers and code folding
Search & Replace
Find and replace text within your JSON data quickly and easily
100% Private
All processing happens in your browser — your JSON never leaves your device
Completely Free
No signup, no limits, no watermark — use our JSON editor online as much as you need
How to Use JSON Editor Online — 3 Simple Steps
1. Paste or Upload
2. Edit & Format
3. Validate & Download
When You Need a JSON Editor Online
- API Development
- Edit and format API request/response JSON data
- Configuration Files
- Edit JSON configuration files for applications
- Data Manipulation
- Modify JSON data before using in applications
- Debugging
- Validate and debug malformed JSON
- Learning JSON
- Practice JSON syntax with real-time validation
- Data Migration
- Edit JSON data before migration between systems
Why Choose Our JSON Editor Online?
Most online JSON editors upload your data to servers — security risk. Our JSON editor works entirely in your browser: faster, safer, and completely private. Edit, format, validate, and explore JSON with syntax highlighting, tree view, and zero data leaving your device.
100% Private
Your JSON never leaves your device. Edit JSON locally in your browser
Syntax Highlighting
Color-coded JSON for easy reading and editing
Tree View
Visual JSON navigation with collapsible tree structure
Format & Minify
Beautify for readability or compress for production
Real-time Validation
Instant syntax checking with line/column error reporting
Line Numbers
Navigate large JSON files easily
Search & Replace
Find and replace text within JSON data
Upload & Download
Load .json files and save your edits
Free Forever
No signup, no limits, no watermark — completely free