JSON Formatter
Format, validate, and minify JSON with syntax highlighting and error line numbers.
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json-formatter.tool
// paste minified JSON →
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JSON Tools
Format, validate, diff, and convert JSON in seconds.
Encoding
Encode, decode, and convert between Base64, URL, JWT, and XML/YAML.
Security
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Generators
Create QR codes, Lorem Ipsum, and unique slugs on demand.
Converters
Convert timestamps, CSV, SQL, and code formats with ease.
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Compress, convert, resize, and prep images - all in your browser.
Text Tools
Test regex, count words, and convert between naming cases.
Color Tools
Convert and preview colors across HEX, RGB, HSL, and CMYK.
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Your everyday toolkit08 tools
Base64 Encoder
Encode or decode text, files, and images to and from Base64 instantly.
JWT Decoder
Decode and inspect JSON Web Tokens - header, payload, and signature, all client-side.
UUID Generator
Generate v1 and v4 UUIDs in bulk, ready to copy or export as JSON/CSV.
Password Generator
Create strong, random passwords with custom length and character rules.
Regex Tester
Test regular expressions live against sample text with match highlighting.
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from text or files in one click.
Color Converter
Convert instantly between HEX, RGB, HSL, and CMYK with a live preview swatch.
From the blog
Real fixes, not fluff.
Troubleshooting guides and deep-dives on the errors, security gaps, and setup headaches developers actually run into — across JSON, security, encoding, and beyond.
Updated regularly·58 articles·544 total views
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Do it right
Browse all 24 guides →Best practices, not just docs
The do's, don'ts, and mistakes to avoid — for JWT, React, Git, and more.
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Yes. Every tool on SyncTonight is free to use, with no account, signup, or credit card required.
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Most tools process inputs locally. Video to QR uploads your video to cloud storage and saves its metadata. Contact submissions are also stored. See our Privacy Policy for details.
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Most tools run entirely client-side, so once the page loads they keep working without an internet connection.
Do you add new tools?
Yes - new tools are added regularly based on requests from the developer community.
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