What is iotools.cloud?
iotools.cloud is a free online tools platform that converts, formats, generates, calculates, and edits everyday inputs for developers, designers, marketers, writers, and everyone in between — no installs, no accounts. IO stands for Input/Output: you give us the input, we hand back the output.
Most tools run entirely in your browser, so results are instant and your data never leaves your device — try the Random Number Generator and watch it work with zero network requests. A few tools need server-side processing, but we never store what you send us either way. See our Privacy Policy for details.
What we do
The catalog is organized into six categories — 1500+ tools today, with more added all the time:
Converters
Convert between formats, encodings, and units — Base64, CSV and JSON, timestamps, and more. Fast, free, and processed right in your browser. Browse converters →
Formatters
Format, beautify, minify, and validate code and data — JSON, HTML, CSS, SQL, and regex. Clean up messy input in one click, with nothing to upload. Browse formatters →
Generators
Generate exactly what you need and on demand — passwords, UUIDs, QR codes, hashes, random numbers, and more. Secure, instant, and free. Browse generators →
Calculators
Crunch the numbers fast — from everyday math to specialized conversions and unit work. Free online calculators that run entirely in your browser. Browse calculators →
Editors
Edit and transform text, code, and images with quick, focused editors that run entirely in your browser — nothing to install, and no sign-up needed. Browse editors →
Utilities
Everyday developer and web utilities — DNS and IP lookups, redirect and certificate checkers, and other quick diagnostics. Free and privacy-friendly. Browse utilities →
What makes us different
Runs in your browser, not on our servers
Most tools process everything client-side — nothing you type, upload, or generate is ever sent to a server. A few heavier tools (certain file conversions, the AI-assisted tools) do need brief server-side processing, and even then nothing you send is stored.
Free without the paywall maze
Every browser-based tool — the overwhelming majority of the catalog — is completely free, with nothing gated behind a subscription just to see the result. A free account only unlocks a bigger monthly allowance, the AI tools, and an API key; only the AI tools, file converters, and API/MCP calls draw down credits at all.
No sign-up needed for almost anything
Open a tool and start working in seconds. Signing in exists to raise your limits and save your work — it swaps a small daily guest allowance for a larger monthly one, and adds favorites and presets that sync across your devices.
One catalog, however you build
The exact same tools are reachable as a REST API with an auto-generated OpenAPI 3.1 spec, as an MCP server for AI agents like Claude, as copy-paste embeddable widgets, through a browser extension and VS Code extension, and via n8n, Zapier, and Make — so how you use iotools.cloud never means switching tools.
Kits, Chains, and Build Your Own Tool
Save the tools you reach for together into a Kit for one-click access, chain one tool's output straight into the next tool's input to build a reusable pipeline, or describe a tool that doesn't exist yet in plain English and Build Your Own Tool checks the catalog first, then generates and saves a private one to your account — no code required.
Who it's for
- Developers and engineers who need a quick converter, formatter, or generator without leaving the browser.
- Designers and marketers who need image, color, and SEO utilities on demand.
- Writers, students, and teachers who need calculators, generators, and quick text tools.
- Automation builders wiring tools into n8n, Zapier, Make, or their own app through the API or MCP server.
- Anyone who just needs a fast, free, private tool for a one-off task.
The team behind iotools.cloud
iotools.cloud is built by a two-person team. Thien, the founder, builds heavily with AI to draft and iterate fast, but nothing ships on vibes — every tool is tested against real inputs and reviewed by hand for correctness, speed, and privacy first. Ruby leads product, turning real user problems into concrete tool briefs and pressure-testing every result against real use cases before it goes live.
Thien is the founder of iotools.cloud and the engineer behind its catalog of free, browser-based utilities. He builds heavily with AI — using it to draft, iterate and ship fast — but nothing goes live on vibes: every tool is tested against real inputs and reviewed by him for correctness, speed and privacy before it ships. He's spent over a decade building web products and developer tooling, which is exactly the experience that tells him when an AI-written tool is actually right versus just plausible-looking.
Ruby leads product at iotools.cloud, shaping the roadmap for a catalog built heavily with AI and held to one bar: would she actually use it herself. She turns real user problems into concrete tool briefs, uses AI throughout research and iteration to move fast, and pressure-tests every result against real use cases before it ships — cutting anything that's clever but not actually useful.
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Other things we make
The same team also builds genname.io, a site dedicated to AI name generators — for characters, games, usernames, and more.
How iotools.cloud works
There's no onboarding — open a tool and start working immediately. Signing up for a free account takes seconds and unlocks the AI tools, a larger monthly allowance, and an API key at /account/.
Every tool page states upfront whether it runs in your browser or on our servers, so you always know before you use it. Support runs through the Contact form — bug reports, feature requests, and tool ideas all reach the same two-person team that builds the catalog, and every message gets read.
Paid plans are self-serve too: the Billing card on your account page opens the Stripe customer portal for invoices, payment methods, and cancellation — see /pricing/ for current plans.
Key facts
| Company Name | iotools.cloud (IO Tools) |
|---|---|
| Type | Free online tools & developer-utilities platform |
| Founded | 2021 |
| Founder | Thien |
| Website | iotools.cloud |
| Core Offering | 1500+ free browser-based tools across 6 categories — Converters, Formatters, Generators, Calculators, Editors, Utilities |
| Pricing | Free for almost every tool, no sign-up · one-time Remove Ads purchase · Builder subscription for the API, MCP server, and higher limits — see /pricing/ |
| Contract Terms | No fixed-term contracts — subscriptions are month-to-month and cancel anytime from the account billing portal |
| Services | Converters, Formatters, Generators, Calculators, Editors, Utilities, REST API, MCP server, browser extension, VS Code extension, embeddable widgets, and n8n/Zapier/Make automation |
| Communication | Contact form at /contact/ (hello@iotools.cloud) |
| Social | X, Facebook, YouTube, TikTok, LinkedIn, Product Hunt — see Follow us above |