How to compress a PDF without uploading it
Every "free" online compressor you've used uploads your file to a company server, processes it there, and — in several documented cases — keeps a copy for hours. For contracts, medical forms, tax documents, and job applications, that's an unnecessary risk. The safer approach is to compress the file where it already is: on your own device.
This tool does exactly that. When you drop a PDF here, your browser:
- Reads the file into memory — never into a network request.
- Finds every embedded image (photos, scans, charts) inside the PDF structure.
- Re-encodes each image at a lower JPEG quality and, where useful, a smaller pixel dimension — in a background thread so the page stays responsive.
- Rebuilds the PDF with the smaller images, strips document metadata, and hands you the result as a download.
Text, vector graphics, page order, and page count are preserved. Image quality is reduced — that trade-off is where the megabytes come from, and the presets let you choose how aggressive to be.
Pick the right preset
Email (≤ 25 MB)
Gmail, Outlook, and Yahoo all cap attachments around 25 MB. This preset tries several quality levels until your file fits — or tells you honestly if it can't.
Portal (≤ 10 MB)
Job portals, visa forms, university uploads, and government sites often enforce a strict 10 MB cap. This preset aims under it in one click.
Web (balanced)
One clean pass for everyday sharing: noticeably smaller files with images that still look sharp on screen.
Maximum squeeze
For when size is all that matters — scanned documents shrink dramatically. Expect visible softness in photos.
Exact size (e.g. 200 KB)
Some portals don't just cap uploads — they demand a file at or under an exact size like 200 KB. Pick this preset, set your target, and the tool binary-searches quality and image dimensions until the output lands close to it. If your PDF can't physically get there, it tells you the smallest size it reached instead of faking it.
When compression won't help much
Honesty matters: a PDF that is mostly text with no images is already tiny, and this tool will tell you so instead of pretending. Scanned pages and photo-heavy documents compress the most — often 60–80% smaller. Password-protected PDFs must be unlocked first. And in Exact size mode, a text-heavy PDF has a hard floor: once the images are gone there is nothing left to remove, so a 700 KB text document will never become 200 KB — the tool reports that as a best-effort result.
Frequently asked questions
Can I compress a PDF to exactly 200 KB?
Yes. Choose the Exact size preset and set 200 KB as the target. The tool tries a ladder of image quality and dimension settings, then binary-searches between the settings that were too big and the first that fit, so the result lands close to 200 KB rather than far under it. The achieved size is shown next to the target on every file, so you can see exactly what you got.
What happens if my PDF can't reach the target size?
You get an honest best effort result: the smallest size the tool could produce, labelled as such, with the target shown next to the achieved size. That usually happens with text-only PDFs or PDFs whose images are already tiny — there is simply nothing left to remove. Try a larger target, or split the PDF into parts and compress each one.
How can I compress a PDF without uploading it anywhere?
Use a tool that processes files locally in your browser. This compressor loads your PDF into your device's memory, re-encodes its images at lower quality in a background thread, and rebuilds a smaller PDF — all with code running on your machine. Your files are never sent to any server; the only network requests on this page are the site's own analytics (Google Analytics and a Cloudflare beacon), which load when the page opens and never see your files. You can verify it by watching the Network tab in your browser's developer tools while it works — the live counter on this page shows zero requests during processing.
Will compressing my PDF delete pages or change the text?
No. Only embedded images (photos, scans, charts) are re-encoded at lower JPEG quality and optionally smaller dimensions. Text, vector graphics, page count, and page order are preserved.
What PDF size should I target for email attachments?
Most email providers accept attachments up to 25 MB. Use the Email preset for that. Job portals and official forms often cap at 10 MB — use the Portal preset for those.
Can I compress a password-protected PDF?
Not directly. Open it in your PDF reader, remove the password (usually via Print to PDF or saving without security), then compress it here.
Is there a file size or daily limit?
No daily or per-file-count limit. A 200 MB safety cap applies per file because browsers can't safely hold larger files in memory — split bigger PDFs into parts first.
How do I verify my files really never upload?
Open developer tools (F12), go to the Network tab, and compress a file — you'll see zero new requests during processing. The live counter in the privacy panel shows the same number. All JavaScript is vendored locally; there are no CDNs or webfonts. The only network requests on this page are the site's own analytics (Google Analytics and a Cloudflare beacon), which load once when the page opens — before processing starts — and never see your files. The page keeps working with your internet disconnected after it loads.