All tools

189 free utilities that run entirely in your browser. Search by name or by what you want to do — nothing is uploaded. Need a specific file conversion? Browse the file converters.

Popular file converters

All converters →

Calculators

Money, loans, interest, percentages and dates.

Age Calculator

Find your exact age in years, months and days.

Percentage Calculator

Percentages, increases and differences made easy.

EMI Calculator

Monthly loan EMI, interest and totals.

SIP Calculator

Estimate mutual fund SIP returns.

Compound Interest Calculator

See how savings grow over time.

GST Calculator

Add or remove GST in seconds.

CAGR Calculator

Compound annual growth rate of an investment.

FD Calculator

Fixed deposit maturity and interest.

BMI Calculator

Check your Body Mass Index in seconds.

Mortgage Calculator

Estimate your monthly home loan payment.

Loan Calculator

Monthly payment, interest and total cost.

Tip Calculator

Tip and split the bill instantly.

Calorie Calculator (TDEE)

Find your daily calorie needs.

Date Difference Calculator

Days, weeks and months between dates.

Discount Calculator

Sale price and savings, instantly.

Average Calculator

Mean, median, sum and range.

Salary Calculator

Hourly to annual pay, and back.

GPA Calculator

Calculate your grade point average.

Temperature Converter

Celsius, Fahrenheit and Kelvin.

Unit Converter

Length, weight, volume, speed & more.

Countdown to Date

Live countdown to any event.

Number to Words

Spell out any number in English.

Aspect Ratio Calculator

Resize keeping the same ratio.

Time Duration Calculator

Hours and minutes between two times.

Currency Converter

Convert between 30+ currencies with live rates.

Sales Tax Calculator

Add or remove sales tax from any price.

ROI Calculator

Return on investment and annualized ROI.

Simple Interest Calculator

Interest and total from principal, rate and time.

Profit Margin Calculator

Gross margin, profit and markup from cost & price.

Markup Calculator

Selling price and profit from cost and markup.

Savings Calculator

Project your savings with monthly deposits.

Pregnancy Due Date Calculator

Estimate your baby's due date from your last period.

Body Fat Calculator

Estimate body fat % with the Navy method.

Ideal Weight Calculator

Healthy weight for your height and sex.

Running Pace Calculator

Pace per km/mile and speed from time & distance.

Grade Calculator

Weighted class grade from your assignments.

Fraction Calculator

Add, subtract, multiply and divide fractions.

Scientific Calculator

Trig, logs, powers and roots — free online.

Standard Deviation Calculator

Sample & population standard deviation.

Square Footage Calculator

Area in sq ft or m² — plus material cost.

Time Card Calculator

Add up weekly hours, breaks and pay.

Developer tools

Everyday utilities for building things.

Base64 Encode / Decode

Encode and decode Base64 text.

UUID Generator

Generate random UUID v4 identifiers.

Password Generator

Create strong, random passwords.

Hash Generator

SHA-256, SHA-1 and SHA-512 hashes.

QR Code Generator

Create QR codes for links and text.

SQL Formatter

Beautify and format SQL queries.

HTML Formatter

Format and indent HTML markup.

XML Formatter

Format, indent and tidy XML.

Markdown Previewer

Write Markdown, preview the HTML live.

Unix Timestamp Converter

Convert epoch timestamps to dates.

Cron Expression Generator

Build and explain cron schedules.

Color Palette Generator

Build palettes from any base color.

Barcode Generator

Create CODE128, EAN and UPC barcodes.

Favicon Generator

Generate favicons, ICO and a web manifest.

JWT Decoder

Decode and inspect a JWT instantly.

Regex Tester

Build and test regular expressions live.

URL Encoder / Decoder

Percent-encode and decode URLs.

HTML Entity Encoder / Decoder

Encode and decode HTML entities.

JSON to CSV Converter

Turn a JSON array into CSV.

CSV to JSON Converter

Convert CSV into JSON objects.

Excel Viewer

Open & view XLSX files online.

Excel to CSV Converter

Convert XLSX to CSV.

Excel to JSON Converter

Convert XLSX to JSON.

CSV to Excel Converter

Turn CSV into an XLSX file.

Excel to PDF Converter

Convert spreadsheets to PDF.

Number Base Converter

Binary, octal, decimal and hex.

Color Converter

HEX, RGB and HSL — instantly.

Text Diff Checker

Compare two texts line by line.

CSS Formatter & Minifier

Beautify or minify CSS.

Online Stopwatch

Start, stop and lap — in your browser.

Countdown Timer

Set a timer with an alarm.

Pomodoro Timer

25-minute focus, 5-minute breaks.

Random Number Generator

Random numbers in any range.

Random Picker

Pick a random name or shuffle a list.

Dice Roller

Roll virtual dice (d4–d100).

Wheel Spinner

Spin a wheel to pick a random winner.

Invoice Generator

Create and download a professional invoice.

Password Strength Checker

Test how strong a password is.

Roman Numeral Converter

Numbers to Roman numerals and back.

Binary Code Translator

Text to binary and binary to text.

HTML, CSS & JS Compiler

Online HTML, CSS & JS compiler with live preview.

Python Compiler

Online Python compiler — run Python in your browser.

JavaScript Compiler

Online JavaScript compiler & playground — run JS instantly.

TypeScript Compiler

Online TypeScript compiler — compile & run TS.

SQL Compiler (SQLite)

Online SQL compiler — run SQLite queries in your browser.

What Is My IP

Instantly see your public IP address.

How RunFreeTools works

RunFreeTools is a free online toolkit of 189+ browser-based utilities — image, PDF, video, audio, text, developer, SEO and AI tools — all in one place. Most of them do their work entirely on your device: instead of uploading your file to a server, the tool uses the browser's own Canvas API and WebAssembly engines to process it locally. That makes them fast (no upload wait), private (your files never leave your computer) and free to run as often as you like.

Pick a tool by name from the search above, or browse by what you want to do — compress an image, merge PDFs, convert a video, run Python, generate a QR code or write with AI. Every tool page includes a short how-to, real use-cases and answers to common questions, so you get the result you need without signing up or installing anything.

Free online tools — frequently asked questions

Are all the tools really free?

Yes. Every tool on RunFreeTools is free to use with no watermark and, for most, no sign-up. The AI tools run on free starter credits you can top up, and every non-AI tool — image, PDF, video, audio, text and developer utilities — is unlimited and completely free.

Do I need to create an account?

No. Open any tool and start straight away — there's nothing to install and no login wall. Signing in is optional and just gives you more monthly AI credits and somewhere to save your work.

Are my files and data private?

For most tools, completely. Image, PDF, text, developer, audio and video tools run entirely in your browser using the Canvas API and WebAssembly (FFmpeg, Pyodide, sql.js), so your files never leave your device and nothing is uploaded. The few tools that need a server — AI generation and some heavy document conversions — process your input securely over HTTPS and never store it.

How do browser-based tools work without uploading?

Modern browsers can do real work on your device. We use the Canvas API for images, WebAssembly builds of FFmpeg for audio and video, Pyodide for Python and sql.js for SQL — so compressing an image, trimming a clip or running code all happen locally, with no round-trip to a server.

What kinds of tools are there?

There are 189+ tools across 9 categories: image (compress, convert, resize, remove background), PDF (merge, split, compress, convert), video and audio (convert, trim, compress), text and writing, developer utilities (JSON, Base64, hashes, formatters, online compilers), SEO helpers, everyday calculators and AI generators.

Do the tools work on a phone?

Yes. Everything runs in any modern browser on phones, tablets, Chromebooks and desktops — no app to download. Heavier jobs like 4K video are limited only by your device's memory.

Is there a file-size or usage limit?

There's no account-based limit. In-browser tools are bounded only by your device's available memory, and you can use them as many times as you like. AI tools use a small number of credits per generation.

Do I have to install anything?

No installs, no browser extensions, no software. RunFreeTools is a website — open a tool and use it instantly.

All Tools — RunFreeTools