Free File Compressor - Reduce File Sizes Instantly

SimpleSize is a powerful file compressor that reduces file sizes instantly. All files are processed securely on our servers using advanced compression algorithms. Optimize files with quality controls and advanced settings. No installation required, completely free, works on desktop and mobile devices.

No registration required - start compressing immediately

Compress files instantly with advanced algorithms

Fine-grained controls with quality presets and advanced options

Download-ready output with detailed compression metrics

Privacy-first - files processed securely and immediately returned

Completely free with no limits or watermarks

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File Compressor Tools - Choose Your Tool

Select a file compressor tool to reduce file sizes

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Why Use a File Compressor?

A reliable file compressor helps you reduce file sizes, save storage space, and improve performance across all your devices

Save Storage Space

Using a file compressor reduces file sizes by 60-80%, freeing up gigabytes of storage on your devices, cloud storage, and servers. Compress large files without losing essential quality.

Faster Sharing & Uploads

When you compress files with our file compressor, smaller file sizes mean much faster uploads and downloads, especially on slower internet connections. Email attachments stay under size limits, and sharing files via messaging apps becomes instant instead of waiting minutes.

Better Website Performance

Using a file compressor for website files makes pages load 2-3x faster, improving user experience and SEO rankings. Faster loading times reduce bounce rates and keep visitors engaged with your content.

Reduce Bandwidth Costs

A file compressor reduces file sizes, which means lower bandwidth usage and hosting costs. For businesses serving thousands of files daily, file compression can cut bandwidth expenses by 70% or more while maintaining quality.

Mobile-Friendly Files

Compressed files use less mobile data and load faster on smartphones and tablets. Perfect for users on limited data plans or slower mobile networks, ensuring your content is accessible to everyone.

Data Compression on Wikipedia Comprehensive encyclopedia article on compression algorithms and techniques
Image Compression on Wikipedia Learn about JPEG, PNG, WebP and other image compression formats
Video Compression on Wikipedia Understanding H.264, VP9, and modern video codecs

Why Use SimpleSize File Compressor?

The best file compressor that respects your privacy and works everywhere you do

Your Files Stay Yours

Privacy is our core principle. Supported file types compress entirely in your browser - your data never leaves your device. For other file types, our file compressor processes files securely and immediately returns them - they are not stored. Your confidential documents and sensitive files deserve this transparency.

No Limits, No Tricks

Forget about "3 free compressions per day" or surprise watermarks on your files. SimpleSize is completely free with no daily caps and no sneaky upsells. Use it as often as you need - we actually mean it.

Instant Results

Fast and efficient processing. Our file compressor processes files quickly on our servers and returns them immediately. Large files? No problem. We handle files of all sizes efficiently.

Works Everywhere

Use SimpleSize on any device - Windows, Mac, Linux, iPhone, Android, or tablet. Our tools work in any modern browser - no installation required.

Fine-Grained Control

Our file compressor gives you full control: adjust quality settings, choose compression presets, select codecs, and target specific file sizes. Complete control over file compression with live previews and detailed metrics.

What Our Users Say

Join thousands of satisfied users who trust SimpleSize file compressor for their file compression needs

Finally a file compressor that processes files securely and doesn't store them. As a designer, client confidentiality is everything. SimpleSize processes files and returns them immediately without storing anything.

Sarah K. Graphic Designer, New York USA

I use SimpleSize daily for invoices and receipts. File compression is fast, free, and no annoying watermarks. Better than all the other tools I've tried!

Markus H. Business Owner, Munich Germany

This file compressor is amazing! Reduced my 50MB file to 8MB without losing quality. Saved my email attachment limit. Highly recommend to all students!

Aisha P. PhD Student, London UK

I use SimpleSize to compress images for my website. The interface is very intuitive and works perfectly on my phone. Excellent tool!

Carlos R. Web Developer, Madrid Spain

Our marketing team uses SimpleSize daily for social media files. Files are processed securely and deleted immediately after compression, which gives us peace of mind for our workflow.

Marie L. Marketing Manager, Paris France

Tested many file compressor tools for my photography business. SimpleSize is the only one that's truly free without hidden limits. File compression works flawlessly.

James T. Photographer, Sydney Australia

I use SimpleSize daily to compress invoices. No installation needed, works on any device, and handles Japanese documents perfectly. The compression quality is excellent!

Yuki S. Freelance Designer, Tokyo Japan

As a teacher, I compress large PDF worksheets daily. Other file compressor tools wanted $10/month for this. SimpleSize does it free and faster. Absolute lifesaver!

Emma V. Elementary School Teacher, Toronto Canada

Frequently Asked Questions

Everything you need to know about file compression