Free JSON Formatter, Validator & Converter Online
JSONGlow is a free, privacy-first developer utility suite that formats, validates, repairs, and converts JSON, XML, TypeScript, and CSV entirely in your browser without uploading data.
Featured Daily Workhorses
JSON Formatter
Format, beautify, indent, sort keys, and inspect nested structures.
YAML ↔ JSON
Bi-directional YAML 1.2 converter for K8s manifests & Docker Compose.
JSON Compare
Split and unified diffs. Ignore key order differences recursively.
To TypeScript
Generate interfaces or type aliases from any JSON payload in one paste.
JSON to CSV
Flatten arrays and nested structures into clean RFC 4180 spreadsheets.
Full Developer Utilities Catalog
25 ToolsJSON Formatter
Format, beautify, indent, sort keys alphabetically, and inspect nested JSON structures.
JSON Repair
Auto-fix unquoted keys, single quotes, trailing commas, missing commas, comments, and Python literals.
JSON Validator
Live strict RFC 8259 syntax checker pointing to exact line and column coordinates of malformed tokens.
JSON Compare & Diff
Side-by-side and unified semantic diff engine. Ignore key ordering and pinpoint structural changes.
JSON Minifier
Strip insignificant whitespace down to the smallest single-line payload for APIs and storage.
JSON to TypeScript
Generate clean TypeScript interfaces or type aliases from any JSON payload automatically.
JSON to Zod Schema
Generate production-grade Zod validation schemas & TypeScript types with one-click .ts download.
XML to JSON
Convert XML to structured JSON with attribute prefixes, CDATA handling, and typed values.
YAML ↔ JSON
Bi-directional YAML 1.2 converter for K8s manifests, Docker Compose, and GitHub Actions.
JSON to CSV
Flatten complex nested structures, handle null primitives, and export cleanly to spreadsheet CSV.
Image to SVG
Convert PNG, JPG, and WebP images to scalable SVG vectors with color quantization and contour tracing.
JPG to SVG
Convert JPG and JPEG photos to clean vector SVG files online with color quantization and contour tracing.
PNG to SVG
Convert transparent PNG logos and icons to scalable SVG vectors in your browser with zero server uploads.
WebP to SVG
Convert WebP images to scalable vector SVG graphics directly in your browser with full transparency support.
SVG Viewer & Studio
Interactive canvas pan/zoom, layer DOM inspector, bulk color swapper, and SVGO-style code optimizer.
JWT Decoder
Decode Base64URL header & payload, check expiration countdown, and verify HMAC/RSA signatures offline.
QR Code Generator
Generate custom high-resolution QR codes for URLs, Wi-Fi, vCards, SMS, and JSON with PNG/SVG export.
JSON Tree Viewer
Interactive visual tree navigator with collapsible nodes, path breadcrumbs, search, and type badges.
JSON to YAML
Convert JSON to clean YAML 1.2 manifests for Kubernetes, Helm, Docker Compose, and CI/CD pipelines.
JSON to XML
Convert JSON objects and arrays into structured, compliant XML documents with attribute mapping.
CSV to JSON
Convert CSV spreadsheets and delimited tables into clean JSON arrays with smart type inference.
JSON Escape
Escape double quotes, newlines, and backslashes for embedding JSON safely in programming code variables.
JSON Unescape
Remove backslashes and quotes from stringified JSON logs and cache entries, restoring clean JSON.
JSON Schema Validator
Validate JSON data payloads against Draft-07 and 2020-12 JSON Schema specifications using Ajv.
Base64 Encode & Decode
Encode and decode text, UTF-8 strings, and JSON payloads into standard Base64 or URL-safe Base64URL.
Developer Guides & Tutorials
Fix Trailing Commas in JSON
Learn why trailing commas cause JSON SyntaxError and how to automatically remove them.
Compare JSON Ignoring Key Order
Deep semantic diffing algorithm that normalizes object key order to catch true data changes.
Flatten Nested JSON
How to unnest hierarchical JSON structures into dot-notation keys for CSV and relational databases.
Unexpected Token in JSON
Troubleshoot and fix 'Unexpected token in JSON' caused by single quotes, HTML error responses, or trailing commas.
Unexpected End of JSON
Troubleshoot and resolve 'Unexpected end of JSON input' caused by truncated payloads and empty fetch responses.
Live Interactive Formatter
Format & Validate JSON in real time
Drop messy or minified JSON directly into the editor. Indent, validate, sort keys, or explore the hierarchical tree.
{
"deploy": {
"service": "api-gateway",
"region": "eu-west-1",
"replicas": 3,
"env": {
"LOG_LEVEL": "debug",
"TIMEOUT_MS": 2500
},
"health": true,
"notes": null
}
}# 13 lines · 208 chars
Frequently Asked Questions
Common questions answered.
Need more help? Our tools execute entirely in your browser without transmitting any payload to remote servers.
Does JSONGlow send my data anywhere?+
No. All formatting, diffing, and conversions happen 100% client-side in your browser. Nothing is transmitted, logged, or stored on any server.
How fast is in-browser processing?+
Because everything runs locally without network roundtrips, transforms execute instantly with zero network latency.
What tools are included in JSONGlow?+
JSONGlow includes 22 high-performance client-side developer utilities: JSON Formatter, JSON Repair, JSON Validator, JSON Compare & Diff, JSON Minifier, JSON Tree Viewer, JSON to YAML, YAML to JSON, JSON to XML, XML to JSON, JSON to CSV, CSV to JSON, JSON Escape, JSON Unescape, JSON Schema Validator, Base64 Encode & Decode, JSON to TypeScript, JSON to Zod Schema, Image to SVG, SVG Viewer & Studio, JWT Decoder, and QR Code Generator, along with in-depth troubleshooting guides.
Is JSONGlow completely free?+
Yes! All tools are 100% free with no account creation, no subscriptions, and no rate limits.