Free Online Converter for PDF, Image, Video, Audio and Units
Convert, compress and edit your files, or convert units and calculate in seconds. OnlineConverter brings 170+ free tools together in one place, with no sign-up and nothing to install.
Browse Free Online Converter Tools by Category
Pick a category to see every tool in it.
PDF Tools
Merge, split, compress and convert PDFs to Word, Excel or images.
Image Tools
Convert JPG, PNG, WebP and HEIC, compress images and remove backgrounds.
Video Tools
Convert MP4, MOV and MKV, compress videos and turn clips into GIFs.
Audio Tools
Convert MP3, WAV and AAC, cut audio, and boost or clean up sound.
Unit Converters
Convert length, weight, time, temperature, data, speed and more, with formulas and charts.
Calculators
Work out percentages, discounts, age, BMI and loan payments in seconds.
Text Tools
Count words, check grammar and rewrite text for free.
Most Popular Tools
PDF to Word
Convert PDF documents to editable Microsoft Word files with precision.
Compress PDF
Reduce file size of your PDF documents while maintaining maximum quality.
Image Compressor
Reduce file size of your images without losing visible quality.
Screen Recorder
Record full screen, window or tab with audio directly in browser.
Video Compressor
Compress large video files locally with high-quality encoding presets.
PDF Tools
Merge, split, compress and convert PDFs to Word, Excel
Image Tools
Convert JPG, PNG, WebP and HEIC, compress images
Video Tools
Convert MP4, MOV and MKV, compress videos and turn clips into GIFs.
Audio Tools
Convert MP3, WAV and AAC, cut audio, and boost or clean up sound.
Unit Converters
Convert length, weight, time, temperature, data, speed and more, with formulas and charts.
Calculators
Work out percentages, discounts, age, BMI and loan payments in seconds.
Text Tools
Count words, check grammar and rewrite text for free.
How to Use OnlineConverter
Simple, fast file conversions and calculations in three easy steps.
Choose a tool
Search for what you need or pick from the categories above.
Add your file or value
Upload a file, or type a number for unit converters and calculators.
Get your result
Download the converted file or copy the answer in seconds.
Why Use This Free Online Converter?
Built from the ground up for speed, simplicity and reliable precision.
All in one place
File converters for PDF, image, video and audio, plus unit converters and calculators, on one site.
No sign-up
Open any tool and start straight away.
Free to use
Every tool is free.
Works on any device
Use it in your browser on phone, tablet or computer.
Clear answers
Unit converters and calculators show the formula and working, not just the result.
Latest Guides from Our Blog
Step-by-step guides to help you get more from your files, units and numbers.
How Many Feet in a Mile? 5,280 ft Explained
There are 5,280 feet in a mile. This guide gives you a quick miles to feet chart, the simple formula with worked examples, easy tricks to remember 5,280, and the story of why a mile is this odd length. It also compares miles with kilometers and nautical miles, and shows what a mile looks like in real life.
Decimal Hours Explained: How to Convert Time for Timesheets and Payroll
Decimal hours turn time into numbers like 7.75 or 38.3. To read them, multiply the decimal part by 60: 0.3 hours is 18 minutes and 7.75 hours is 7 hours 45 minutes. This guide includes a decimal hours chart, a timesheet example and the 7.30 vs 7:30 mistake, plus payroll rounding rules.
How Long Is 100 Minutes? Everyday Examples of Common Time Lengths
100 minutes is 1 hour 40 minutes, or 1.67 hours. That’s about the length of a typical feature film. This guide turns common minute values (75, 90, 120, 180, 300 and 1000 minutes) into hours, with real-life examples and a simple 2-step method to work it out yourself.
How to Reduce PDF File Size (Under 100KB, 200KB or 1MB)
Is your PDF too big to email or upload? This guide shows how to reduce PDF size for free, compress a file to 100KB or 200KB for online forms, and keep it readable. You'll also learn why PDFs get so large, plus easy methods for Word, Mac and your phone.
Frequently Asked Questions
Quick, clear answers to common questions about file security, privacy, limits, and supported formats.
Is OnlineConverter free?
Do I need to install any software?
What file types can I convert?
Is there a file size limit?
What happens to my files after conversion?
Can I also convert units & calculate?
Still have questions?
Can't find the answer you need? Reach out to our team for quick assistance.