Free Online Tools — One Tab, Every Tool You Need

Quick online tools for developers, designers, and everyday tasks. Free to use, no sign-up, and nothing you do leaves your browser.

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5,553+

Free tools

83

Categories

0

Sign-ups required

From open tab to done

Three steps, no sign-up, no install.

01

Find your tool

Search by name or browse 83 categories. Whatever you came for is a click or two away.

02

Get to work

Tools run right in the page. No account to set up, no waiting on a server.

03

Close the tab

Your work stays on your device the whole time. When you're done, nothing's saved and nothing follows you.

Tools for every workflow

The eight busiest categories, with hundreds of tools inside.

Unit Converters

Convert length, weight, temperature, and other units.

Engineering Tools

Structural, mechanical, and construction calculators.

Developer Tools

Format, minify, and debug code and APIs.

Math Calculators

Geometry, algebra, and advanced math calculators.

Health & Fitness

BMI, calorie, and fitness calculators.

Currency Converters

Convert between world currencies with indicative rates.

Date & Time

Calculate durations, convert time zones, and more.

Chemistry Tools

Molecular biology, biochemistry, and chemistry calculators.

Popular today

The tools people open again and again.

Format, validate, and minify JSON data instantly.

Image Compressor

Reduce image file size by up to 90% in your browser.

Count words, characters, sentences, and paragraphs.

Password Generator

Generate strong, random passwords instantly.

QR Code Generator

Create custom QR codes for URLs, Wi-Fi, and text.

Switch between UPPER, lower, camelCase, and more.

Calculate Body Mass Index and ideal weight range.

Combine multiple PDF files into one document.

Currency Converter

Convert currencies with live exchange rates.

Find your public IP, location, and privacy score.

Calculate your exact age in years, months, and days.

Resize JPG, PNG, and WebP images to exact dimensions.

Built for the open web

No corporate accounts, no data harvesting, no upsells.

100% Free

No hidden fees, no paywalls, no freemium tiers.

Runs in your browser

Processing happens on your machine, and most tools keep working offline once loaded.

No account needed

No sign-up and no email to confirm. Open a tool and start using it.

Privacy-first

Your files stay with you. No uploads, no behavioral tracking.

About

What is Top10k Tools?

Top10k Tools is a free collection of 5,553+ online utilities that run entirely in your browser.

Converters, calculators, generators, and developer tools — no account, no installs, no uploads. Everything runs on your device, so your data never leaves it. Pick a tool, get your result, and close the tab. New tools are added regularly.

Frequently asked questions

What is Top10k Tools?

Top10k Tools is a free collection of 5,553+ online utilities — converters, calculators, generators, and developer tools — that run entirely in your browser. No account, no installs, and no uploads.

Are the tools really free?

Yes. Every tool on Top10k Tools is 100% free, with no account, payment, or freemium tier.

Do I need to sign up?

No. There is no sign-up and no email to confirm — open any tool and start using it.

Is my data safe?

Yes. Tools run client-side in your browser, so your files and inputs stay on your device and are never uploaded to a server.

How many tools are there?

Top10k Tools has 5,553+ tools across 83 categories, and new tools are added regularly.

Can I request a tool?

Yes. If a tool you need is not here yet, request it on the Request a Tool page — many requests go live within a day, and every tool stays free.

Pick a tool and go

5,553+ tools, free, no sign-up

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