Spoold is a free, privacy-first developer toolbox that automatically detects what you paste (JSON, HTML, JWT, curl, etc.) and suggests the right tool. No sign-up required.

Is Spoold free to use?

Yes, Spoold is completely free to use. All tools work client-side in your browser with no data sent to servers.

Is my data safe with Spoold?

Absolutely. All processing happens in your browser. We don't store or transmit your data. Shared links use client-side encryption.

What tools are available?

Spoold includes JSON formatter, JSON diff, HTML preview, JWT decoder, time converter, CSV viewer, URL inspector, QR code generator/scanner, regex tester, Markdown preview, and curl converter.

Can I use keyboard shortcuts?

Yes! Press Cmd/Ctrl+K to search, or use shortcuts like 'jj' for JSON, 'hh' for HTML, 'tt' for Time converter, and more.

Magic Box: Paste Anything, We Detect

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Auto-detects 40+ formats: JSON, JWT, HTML, timestamps, code, and more. Smart suggestions with learning system.

40+ format detectionSmart suggestionsClient-side learningMulti-tool workflows

Press Cmd/Ctrl + K to quickly access any tool

Keyboard shortcuts for instant tool access

Try now →

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Magic Box

Paste anything — JSON, HTML, curl, JWT, CSV, regex — we detect it instantly and show you the right tool. We learn your patterns and suggest workflows automatically.

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Code Editor: 40+ Languages

Edit and run code in 40+ languages. JavaScript, Python, Java, Go, Rust, and more with syntax highlighting.

40+ languagesCode execution

Try it →

About Spoold

Spoold is a free, privacy-first developer toolbox built for developers who want instant results without sign-ups or data uploads. Format JSON, preview HTML, decode JWTs, convert curl commands, hash files, generate QR codes, and use 40+ tools—all in the browser.

Paste any content into the Magic Box on the homepage and it detects the format automatically: JSON, HTML, JWT, Base64, CSV, regex, timestamps, and more. You get the right tool suggestion in one click. Everything runs client-side, so your data never leaves your device.

No account required, no tracking, no ads in the way. Save and share your work via link when you need to. For the full story and feature list, visit the About page.

Learn more about Spoold

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