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Use this browser-based PDF compressor to reduce file size, preview the document details, and choose a compression mode that fits email, uploads, or web sharing.
What you will get
Clear input, result, and explanation in one place
The result shows the compressed download, file size comparison, and savings summary.
Quick overview
PDF compression reduces file size so documents are easier to email, upload, and store. It is most useful when the file has image-heavy pages, embedded data, or extra structure that can be simplified without making the document harder to read.
Best fit
This tool is a practical fit for anyone who needs to share PDFs faster, meet upload limits, or reduce storage usage. It is especially helpful when you want a smaller document without converting it into a different format.
Calculator
Upload
PDF onlyUpload a PDF, choose a compression preset, and compress it locally in your browser when possible.
Selected file
No file selected yet.
Compression settings
Use stronger compression for the smallest possible file size. Best for tight upload limits, but may reduce visual quality more.
Result
Compressed preview will appear here
Upload a PDF, choose compression settings, and compress the file to see the download card.
Current mode
Balanced
Extra small: Enabled
Workflow
Upload, compress, download
How to read this
Compression works best when the PDF has images, redundant structure, or metadata that can be simplified. Text-heavy PDFs often compress modestly, while image-heavy PDFs can see larger savings.
PDFs are compressed locally in the browser when possible. Results vary depending on the document structure and source images.
How it works
PDF compression reduces embedded data, removes unnecessary metadata, and rewrites the document structure in a more efficient way. The goal is to keep the file readable while making it lighter and easier to move around.
When to use it
Compress a PDF when you are uploading to a site with size limits, sending a document by email, reducing storage use, or sharing a file faster on mobile or desktop. It is a simple way to make a document easier to work with.
Comparison
Compression keeps the file in PDF form and reduces size, while conversion changes the file into another format such as JPG or PNG. They solve different problems, so the right choice depends on whether you want a smaller PDF or a different output type.
Practical limits
Compression can remove overhead and simplify images, but it cannot always shrink a document dramatically if the file is already tight or if it is mostly text. That is why the preview shows the real size change instead of promising a fixed result.
Compression modes
High Quality keeps more of the original structure, Balanced is the safe default, and Maximum Compression pushes harder for smaller files. The separate Extra Small toggle adds one more layer of aggressive cleanup when file size matters most.
Trust signal
This tool is for general use and compresses locally in the browser when supported. Files are not stored permanently by the page, and the workflow is designed to stay clear and privacy-friendly.
Common questions
Upload a PDF, choose a compression mode, click Compress PDF, and download the smaller file if the result is acceptable.
It can, especially if the PDF contains many images. The goal is to keep text readable while reducing unnecessary file weight.
It depends on the file. Image-heavy PDFs often shrink more than text-only PDFs, and some files may only reduce a little.
Balanced is the safest default. Use High Quality when readability matters most and Maximum Compression when you want a smaller file. Enable Extra Small when you want the strongest cleanup path.
It adds a more aggressive cleanup layer on top of the selected preset for the smallest possible file size.
Yes, the workflow is designed to run locally in the browser when possible and does not require an account.
You can often reduce file size with little visible change, but there is no universal way to reduce every PDF with zero tradeoff.
PDFs often become large because they contain embedded images, repeated structure, fonts, or metadata that add weight to the file.
No. Compression keeps the file as a PDF. If you need a different format, you would use a conversion tool instead.
Helpful guide
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