Smaller files that still look right

Compress PDF, JPG, MP4, PNG and other files easily

Easily upload, compress, preview and download
Keep resolution and colour looking untouched
Hit any size limit for free
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Drop Files Here to Shrink
PDF · JPG · PNG · MP4 · MP3
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Files are encrypted in transit and deleted after 2 hours

More than a file shrinker

Simplify your quality control

  • Get under the limit without the mush

  • Preview the result before you download it
  • Choose a target size or a quality level
  • Keep transparency, colour profiles and metadata
Quality control

Simplify your images

  • Turn heavy photos into web-ready ones

  • Shrink JPG, PNG, WEBP and GIF in a few clicks
  • Compress securely from your computer, phone or tablet
  • Keep your originals protected with end-to-end encryption
Image compression

Simplify your batches

  • Do the whole folder in one pass

  • Drop in a set of files and compress them together
  • Apply one size target across every file
  • Download the finished set as a single archive
Batch compression

Here's why people trust us

Making big files simple
The CompressSimpli app showing a file before and after compression The CompressSimpli app showing a file before and after compression
An AI-powered compression suite with everything you need
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All you need to
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Frequently asked questions
Simple answers to your questions
What is the best free file compressor?
CompressSimpli is the best free online software compression tool because it supports commonly used formats, such as PDF, JPG, PNG, and MP4. A big plus is that the Image Compressor and Batch Compressor are simple to use.
How do you compress a file on an iPhone or Android device?
Use CompressSimpli to compress, preview or download any file from any device. Our online Compressor is compatible with the most used web browsers including Chrome, Safari, Firefox, Microsoft and Opera.
Is CompressSimpli safe?
Yes, your file is 100 percent secure. Our customers' safety is first and foremost, so we don't store your information or file data. Compress PDFs to email size, web size, or a custom target worry-free.
How do you compress audio online?
CompressSimpli  allows you to easily shrink recordings on Mac, Windows, Linux, or any other operating system without needing to download any software or extensions. Simply open the CompressSimpli Audio tool, select the file size and save the new file.
Compress files now
Our software makes compression for documents and media fast and simple-
just upload a file or another media type to begin