PDFSizeFit
Start compressing

Get your PDF under the size limit you need

Compress to 100 KB, 500 KB, 1 MB, or any size you choose

Pick the size your upload form or inbox allows. The compressor works toward it in your browser and shows the measured result before you download.

Files are processed on your device and never uploaded.

Compress a PDFExplore All PDF Tools

Free · No signup · Browser-based

Target size

Compress PDF to a specific size

Upload forms and email providers often cap PDFs at a fixed size. Pick the limit you need to meet.

The compressor keeps the highest image quality that fits under your limit. If a file can't get that small, it says so and gives you the smallest version it made.

Before you compress

Why is your PDF so large?

Two PDFs with the same 20 pages can be 200 KB or 20 MB. The difference comes from how the file was made, not from how much text is in it.

Read why PDFs get large

  1. Scanned pages

    A scanner stores each page as a photo of the paper. A page of typed text can be a few kilobytes; the same page scanned can be a megabyte or more.

    Compression helps most Page images are re-encoded as JPEG at the highest quality that fits your target. On a long scan, a small target looks softer.

  2. Oversized photos

    Word processors and design tools can embed photos at a far higher resolution than the page ever shows them.

    Compression helps Re-encoded the same way as scans, at the best quality that fits.

  3. Leftover file structure

    Files that were edited, re-saved, or merged pick up unused objects and uncompressed internal data.

    Compression helps Repacked, with unused objects dropped. Nothing on the page changes.

  4. The same font, embedded again and again

    A PDF put together from several documents can carry the same font several times over.

    Compression won't fix this This tool doesn't merge fonts. Exporting again from the original program is the fix.

Common jobs

Compress for your situation

Pick the one that sounds like your file.

  • It's too big to email

    Gmail stops at 25 MB, and attachments grow by about a third in transit, so a file just under the limit can still bounce.

    Compress a PDF for email

  • It's a big scan or image-heavy report

    Scans and photo-heavy files have the most room to shrink. Each file can be up to 100 MB.

    Compress a large PDF

  • You have a whole folder of them

    Compress several PDFs to the same target size, then download them one by one or together as a ZIP.

    Batch compress PDFs

  • A portal won't accept it

    Job, visa, and school forms often reject anything over a fixed size. Use that number as your target instead of guessing at a quality level.

    How to hit an exact size

How it works

Pick a size. Get a measured result.

  1. Choose your PDF

    Drop it on the compressor or browse for it. It opens right in your browser tab, with no upload.

  2. Set the size you need

    Choose a preset from 100 KB to 2 MB, or type your own limit in KB or MB.

  3. Check the result, then download

    The tool tries several quality levels and keeps the best one that fits. You see the measured size before you save anything.

More on how the compressor works

Examples only. How small a file gets depends on what's inside it: scans shrink a lot, and text-only files have little to remove.

More tools

Other things you can do with a PDF

Merge, split, reorder, edit, and convert. Each tool runs in your browser, the same way the compressor does.

Guides

Learn how to make PDFs smaller

Upload limits, email caps, scans, and what to do when a file won't shrink.

Start here

How to Compress a PDF to a Specific Size

How to get a PDF close to an exact size like 500 KB or 1 MB, why "high/medium/low quality" presets don't do this, and what to expect when a target genuinely can't be hit.

View all guides

Privacy

Your PDF stays on your device

The website loads from our server like any other. Your PDF doesn't go back to it.

  • No upload step

    Your file opens in the browser tab and is compressed there, by code that downloaded with the page.

  • Enforced in the code

    The page's security policy only lets it connect to this site, and an automated test fails if the PDF code tries to make a network request.

  • Gone when you close the tab

    Files are held in memory only. The site saves two small settings in your browser: your theme and your last target size.

  • No account

    There's nothing to sign up for, so there's no account to tie a file to.

See how to check it yourself Read the privacy policy

FAQ

Questions people ask first

Short answers here. The full list covers batches, phones, and more.

See all frequently asked questions
Are my files uploaded to a server?

No. Every tool — compressing, merging, splitting, organizing, editing, and converting — runs entirely in your browser. Your files are never uploaded, and we never see their contents.

Can I compress a PDF to an exact file size?

You choose a target size, and the tool keeps the highest image quality that fits under it, without going below a set minimum. If it reaches your target, it shows the measured size. If it can't (some PDFs, especially text-heavy ones, are already close to their smallest size), it tells you and gives you the smallest file it made.

Will compressing my PDF reduce its quality?

A PDF with no images is only repacked, so it looks exactly the same. Photos and scans are re-encoded, at the highest quality that still fits your target, so a small target on a scanned document can make it visibly softer. Pages are only turned into images as a last resort, and the result screen tells you when that happens.

Is PDFSizeFit free?

Yes. Every tool on the site is free, with no account, payment, or subscription required.

Do I need to create an account?

No. There's no sign-up or login of any kind.

Got a PDF that's too big?

Drop it into the compressor, pick the size you need, and see the measured result before you download.

Compress a PDF

Runs in your browser · Free · No account