Compress PDF without losing quality

Compress PDF files online — fast, free and without losing quality

Large PDF files are a daily headache. They are slow to email, get rejected by upload forms with strict size limits, and eat up storage on your phone and laptop. Our free online PDF compressor solves that in seconds. Upload your document, choose how much you want to shrink it, and download a smaller file that still looks great no software to install and no sign-up required.

Whether you need to reduce a scanned contract to fit an email, squeeze a portfolio under a 1 MB upload limit, or hit an exact target like 100 KB or 200 KB, this tool gives you precise control over the final size while keeping your text sharp and your images clear.

Why compress a PDF?

PDFs grow large for a few common reasons: high-resolution scanned pages, embedded photos, screenshots, and fonts that are stored in full rather than subsetted. Compressing a PDF brings real, practical benefits:

• Send files by email. Most providers cap attachments at 20–25 MB, and many web forms are far stricter.

• Upload faster. Smaller files move quickly over slow or mobile connections.

• Meet portal limits. Government, banking, university and job-application portals often demand files under 100 KB, 200 KB or 500 KB.

• Save storage. Compressed PDFs take up a fraction of the space on your device or cloud drive.

• Share with ease. Lighter files are quicker to download for whoever you send them to.

How our PDF compressor works

Behind the scenes, the tool re-processes your document with a professional PDF engine. It intelligently downsamples images to a sensible resolution, re-encodes them efficiently, subsets the fonts so only the characters you actually use are stored, and removes duplicated and redundant data. The result is a dramatically smaller file that keeps the visual quality your readers expect.

Crucially, when you ask for a specific target size, the engine doesn't just guess. It tries a range of quality settings and automatically selects the highest quality that still fits under your chosen limit so you always get the best-looking file possible for the size you need.

Three compression modes

Best Result

The default mode strikes the ideal balance between file size and quality. It noticeably reduces the size of most documents while keeping images crisp and text perfectly readable. This is the right choice for everyday documents, reports and presentations.

Maximum

When the smallest possible file matters more than pixel-perfect images for example, a text-heavy document you simply need to email Maximum mode applies the most aggressive compression for the tiniest result.

Custom Size

Need to hit an exact figure? Pick a preset (100 KB, 200 KB, 300 KB, 500 KB or 1 MB) or type your own target in KB or MB. The compressor works toward that limit and delivers a file at or just under it, at the best quality achievable.

Compress a PDF to a specific size

One of the most requested features is compressing a PDF to an exact size, and our tool is built for it. Application portals frequently insist on documents under a fixed limit, and getting there by trial and error is frustrating. Instead, choose your target and let the engine do the work:

• Compress PDF to 100 KB — ideal for ID documents and single-page forms.

• Compress PDF to 200 KB — great for short multi-page documents.

• Compress PDF to 300 KB — a comfortable size for most everyday files.

• Compress PDF to 500 KB — keeps more detail for image-rich documents.

• Compress PDF to 1 MB — perfect for presentations and portfolios.

Will compression reduce quality?

Compression always involves a trade-off between size and fidelity, but our goal is to make that trade-off invisible. In Best Result mode the difference is usually imperceptible for normal reading and printing. Text stays vector-sharp because it isn't turned into an image, and photos are downsampled smoothly rather than crudely. Only when you push toward very small targets on image-heavy files will you start to notice softer pictures and even then, the engine protects readability first.

Your files stay private

Privacy matters. Your document is processed securely and is automatically deleted after compression we never keep, read or share your files. Because there is no account to create, you can compress sensitive documents with peace of mind and nothing is tied to your identity.

Works on every device

The compressor runs entirely in your browser, so it works the same on Windows, macOS, Linux, Android and iPhone. There is nothing to download or update. Open the page, drop in your PDF, and get a smaller file in seconds whether you're at your desk or on the move.

Tips for the best results

• Start with Best Result. It's the sweet spot for most documents; only switch to Maximum if you need a smaller file.

• Use Custom Size for strict limits. If a portal demands "under 200 KB", set that exact target.

• Scanned documents compress the most. High-resolution scans have the most room to shrink.

• Re-compressing has limits. A file that's already heavily compressed can't shrink much further without visible quality loss.

Ready to make your PDF smaller? Upload your file above, choose your size, and download a perfectly compressed document in seconds completely free.