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Online Multi Tools
About us

Built for developers.
Free forever.

Online Multi Tools is a growing collection of free, in-browser developer utilities. No accounts, no servers, no distractions. Just the tools you need, available instantly.

Zero server calls
No account needed
No trackers
Always free
Developers shouldn't have to choose between a great tool and their privacy.

Too many utilities demand an account just to format some JSON, or quietly send your data to a third-party server. We built Online Multi Tools to be a calm, fast, trustworthy alternative: every computation happens in your browser, nothing is ever uploaded, and the site works perfectly without an account.

We're not building toward a paid tier or an ad-supported model. The tools are free because developers deserve free tools. End of story.

What we stand for

Privacy by design

All processing runs in your browser using JavaScript. We never see your inputs, never log them, and never store anything on a server. Paste tokens, hash passwords, or process production data with complete confidence.

Zero server calls Client-side JS only Open & inspectable

Always free

No paid plans, no feature walls, no credits system. Every tool is fully free to every developer, forever.

No distractions

No pop-ups, banners, cookie walls, newsletter prompts, or chatbots. Just the tool you came for.

Fast by default

Static pages, no heavy server round-trips. Tools load and respond instantly, even on a slow connection.

Safe with sensitive data

Decode JWTs, hash passwords, inspect production logs. Nothing is transmitted. Your data stays on your device.

How it works
01

Visit the tool

Navigate directly or search with ⌘K. No account, no loading screen.

02

Paste your data

Paste, type, or upload locally. Your browser processes everything. Nothing leaves your device.

03

Copy the result

Copy, download, or keep working. Star any tool to save it to your favourites for quick access.

Your data never leaves your browser.

Every tool runs entirely client-side using JavaScript. No inputs are transmitted to any server, stored in a database, or visible to us. Analytics use Plausible, cookie-free and GDPR compliant.

DevTools — Network

$ Formatting JSON (4,821 bytes of data)

✓ 0 outbound requests — processed in 2ms

$ Decoding Base64 token

✓ 0 outbound requests — processed in <1ms

$ Hashing password with SHA-256

✓ 0 outbound requests — processed in <1ms

All computations run locally. Network tab stays empty.

Frequently asked questions
Are these tools really free?
Yes, completely. There is no paid plan, no freemium model, no credits system, and no hidden charges. Every tool on this site is free to use without limit.
Do I need to create an account?
No. The site works fully without any account. Favouriting tools is stored locally in your browser via localStorage. No login required.
Are my inputs sent to a server?
No. All processing happens in your browser using JavaScript. We have no server that receives tool inputs. You can verify this yourself by opening DevTools → Network tab while using any tool. You will see zero outbound requests during processing.
What analytics do you collect?
We use Plausible Analytics, a privacy-preserving, GDPR-compliant service that uses no cookies and collects no personal data. We see aggregate page views and referrers, nothing more.
Can I suggest a new tool?
Absolutely. Use the Contact page to send a feature request. We build based on what developers actually need.

What's next?

Explore 10 categories of tools, or suggest one we should build.

Every tool runs in your browser. No signup, no waiting. Got an idea? We build based on what developers actually need.

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