✦ Simple online file compression

Make your files
smaller and easier to share.

Compress PDFs and images online to reduce file size, save storage space and make files easier to upload, send and share.

Drop your file here

or choose a file from your device

✓ PDF compression ✓ Image compression ✓ Simple interface ✓ No software required

What is file compression?

File compression is the process of reducing the amount of storage space required by a file. A smaller file can be easier to upload, send by email, store and share.

Different file types use different methods of compression. For example, image compression can reduce the amount of data used by a photograph, while PDF compression can reduce the size of a document by optimizing images and other content inside it.

Smaller files Reduce unnecessary file size before storing or sharing your files.
Easier sharing Smaller files can be more convenient to send and upload.
Save storage space Reducing file size can help you use your available storage more efficiently.

Why would you compress a file?

Large files can become difficult to send through email, upload to websites or store on devices.

Compressing a file before uploading it can help when a website has a maximum file-size limit.

Image compression can also be useful for websites, where unnecessarily large images may increase the amount of data visitors need to download.

How file compression works

The process is designed to be straightforward. Choose a supported file, process it and save the smaller result.

1

Choose your file

Select a PDF, JPG, PNG or WebP file from your device.

2

Compress it

Our compression tool processes the file and works to reduce unnecessary file size.

3

Download the result

Save the compressed file to your device and use it wherever you need it.

Compression guides & resources

Learn how different file formats work, why files become large and how to reduce file sizes for everyday tasks.

📄
PDF

How to Compress a PDF Without Losing Important Content

Learn what makes PDF files large and what to consider when reducing their size.

Read guide →
🖼️
Images

JPG vs PNG: Which Image Format Should You Use?

Understand the differences between JPG and PNG and when each format makes sense.

Read guide →
📦
File Size

Why Are My PDF Files So Large?

Explore common reasons PDFs become large and practical ways to reduce their size.

Read guide →
🌐
Web

How to Compress Images for a Website

Learn why image file size matters for websites and how different formats affect file size.

Read guide →
📱
Mobile

How to Reduce Image Size on Your Phone

Understand simple ways to prepare large photos for sharing and uploading.

Read guide →
🧩
Compression

Lossy vs Lossless Compression Explained

Learn the difference between lossy and lossless compression and when each approach is useful.

Read guide →

Frequently asked questions

Common questions about file compression and using online compression tools.

Compresify provides tools for common formats such as PDF, JPG, PNG and WebP. Additional tools may be added as the platform grows.
Compression results depend on the file and the type of compression being used. Some files are already highly compressed and may not become significantly smaller.
Some image compression methods can reduce visual quality. The amount of change depends on the format, compression method and settings used by the tool.
A smaller PDF can be easier to attach to an email, upload to a website or share with another person.
Yes. Reducing unnecessarily large image files can make them more convenient to upload and can reduce the amount of data required to load them.
Compresify is designed as an online service, so the compression tools can be accessed through a web browser without installing a desktop application.

Ready to make your files smaller?

Choose a compression tool and start reducing the size of your documents and images.

Start Compressing