Why can't every PDF be compressed?

PDFs that consist mostly of already-compressed content (scanned images in JPEG, for example) have little room left to shrink. We'll try, but we'll tell you honestly if we can't reach your target.

What's the difference between Balanced, Strong, and Maximum?

Balanced preserves readable quality. Strong reduces image quality noticeably but keeps text sharp. Maximum may rasterize pages - turning text into images - to reach aggressive targets. We warn you before each.

Will image quality look bad?

Balanced mode targets a quality level that's hard to notice on screen. Strong mode will show some compression artifacts on close inspection. We show you a quality estimate so you can judge.

Do you keep any logs?

We don't log file names, file contents, or any data about your files. Standard web analytics may record that you visited the page, but nothing about what you compressed.

Can I use it offline?

Yes. Install 5MB.me when your browser shows the install prompt. The app and its compression tools are then available offline. Your files continue to be processed only on your device.

Files never leave your browser

Make your file fit.

Make PDFs and images smaller with targets tailored to each file. Everything happens in your browser. No uploads, no account, and nothing left behind.

Files uploaded: 0
In-browser: 100%
Avg. compress: ~2.3s

Drop your file here

or click to browse - PDF, JPG, PNG, WebP up to 100MB

PDFJPGPNGWebP

How it works

Three steps. No server.

Everything below the fold is just the same story: your file, your browser, your download.

Drop the file

PDF, JPG, PNG, WebP. We read it locally with the File API - nothing is uploaded.

Pick a target

Choose a target based on the original file size, or enter a custom one. We adjust quality and dimensions until it fits.

Download & go

Save the smaller file. Close the tab and every trace is gone. We don't even know you were here.

Under the hood: Canvas API decodes images and renders PDF pages, WebAssembly encoders (mozjpeg, libwebp, oxipng) compress the output, PDF.js parses PDFs client-side, zero network requests during compression.

Ready to make it fit?

Choose a file and set your target in the next step.

Private by design

Your file never leaves your device.

Canvas API and WebAssembly process your file on-device
Zero bytes uploaded: no server receives your document
No account, no email, no registration required
Files stay in memory and are cleared when you close the tab
Works in Chrome, Firefox, Safari, and Edge
Your original file is never modified or overwritten

FAQ

Questions, answered honestly.

We'd rather tell you when a file can't be compressed than pretend our tool is magic.

Correct. Compression runs entirely in your browser using the Canvas API, WebAssembly encoders (mozjpeg, libwebp), and PDF.js. Your file's bytes never reach our server — we do not run one to receive them.