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Free Online PDF Compressor, Smaller File Size, Quality You Choose

Make a PDF small enough to email or upload. Pick how hard to compress, see the before and after size for each file, and keep the version that looks right to you. Scanned pages and image heavy documents shrink the most. Everything is compressed inside your browser, so nothing is uploaded.

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Free Online PDF Compressor, Smaller File Size, Quality You Choose

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Compress PDF File Size Drag and drop a PDF file here to shrink file size. 100% browser-based with total privacy. Select PDF File Up to 100 MB • 500 pages max for image-based levels

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Need a Specific Size? Start Here

Most people arrive with a limit to meet, not a percentage.

If you need	Try this level	Worth knowing
Under 100 KB	Maximum	Text-only documents usually get there. Scans rarely do in one pass
Under 200 KB	Maximum	A few pages of text, or one scanned page
Under 500 KB	Strong	The most common government form limit
Under 1 MB	Strong	Most job and visa application portals
Under 2 MB	Balanced	Comfortable for a scanned multi-page document
Under 5 MB	Balanced	Fine for most email attachments
Under 10 MB	Light	Gmail and Outlook both allow around 25 MB
Keep text sharp	Lossless	Smaller saving, but text stays selectable and searchable

The honest part: how far a file shrinks depends far more on what is inside it than on which level you pick. A page of text was already efficient and has little to give. A scanned page is a photograph of paper and can often lose 80% without looking any worse. The tool shows you the new size before you download, so you can try one level, check, and step down if you are still over the limit.

How to Compress a PDF

Five steps, and nothing leaves your computer.

Step 1

Drop your PDF onto the upload area, or click to browse. The file is opened by your browser and never uploaded.

Step 2

Check the details. The original size and exact page count are read straight from the document.

Step 3

Pick a level. Lossless keeps your text selectable; the stronger levels turn pages into images for much bigger savings.

Step 4

Press Compress and watch the progress. Large documents are processed one page at a time so the tab stays responsive.

Step 5

Compare before and after, then download. If the result came out bigger than the original, we tell you and keep your original instead.

What Each Compression Level Does

The honest trade-off behind every setting.

Level	Quality	Typical saving	Text stays selectable?
Lossless	Original quality, nothing is re-encoded	Usually 5% – 20%	Yes, text is untouched
Light	High quality (~85%) at 150 DPI	Usually 10% – 30%	No, pages become images
Balanced	Good quality (~70%) at 120 DPI	Usually 40% – 60%	No, pages become images
Strong	Medium quality (~50%) at 96 DPI	Usually 60% – 75%	No, pages become images
Maximum	Basic quality (~35%) at 72 DPI	Usually 75% – 90%	No, pages become images

Key Features & Capabilities

Designed for speed, privacy, and precision.

Nothing Is Uploaded

Your document is opened, compressed and saved entirely by your own browser. It never touches a server.

Five Compression Levels

From a lossless structure cleanup all the way to maximum reduction. You choose the trade-off.

A Mode That Keeps Text

Lossless mode leaves your text selectable, searchable and readable by screen readers. Most compressors do not offer this.

Honest Before & After

Exact original size, final size and percentage saved. No rounded-up marketing numbers.

Never Returns A Bigger File

If compression would make the file larger, we say so and hand back your original untouched.

No Upload Wait

There is no queue and no upload bar. A 40 MB report starts processing the moment you drop it.

Free & Unlimited

No account, no daily cap, no watermark and no file size paywall.

About the PDF Compressor

This tool makes a PDF smaller, right inside your browser. There are five levels, from a lossless cleanup that keeps your text selectable through to maximum reduction for a strict upload limit. You see the before and after sizes, then download the result. No account, no watermark, no upload.

Most people arrive here with a number to hit rather than a percentage in mind: under 500 KB for a government form, under 1 MB for a job portal, small enough to email. The table above matches those limits to a level, so you can start in roughly the right place instead of guessing.

How much a file shrinks depends far more on what is inside it than on which level you choose. A page of text was already efficient and has little left to give. A scanned page is a photograph of paper and can often lose 80% of its size without looking any different. That is why the same setting behaves so differently on two documents.

Nothing is uploaded at any point. The compression is done by JavaScript running on your own machine, which is why it keeps working after you disconnect. For payslips, passport scans, medical letters and signed contracts, that difference is the whole reason to use this rather than a site that takes your file first and promises to delete it later. The size ceiling of 100 MB exists for the same reason: the work happens in your device’s memory.

Frequently Asked Questions

Everything you need to know about compressing PDF files.

Pick the Maximum level. For a text document that is usually enough, because text compresses extremely well. Scanned pages are a different matter: a photograph of paper carries a lot of detail, and squeezing one page under 100 KB often means it becomes hard to read. If the file is a scan, aim for 500 KB and check whether that is really below the limit you were given.

Gmail and Outlook both accept around 25 MB, so most PDFs go through untouched. The tighter limits come from web forms rather than email: government portals, job applications and visa sites often cap uploads at 500 KB or 1 MB. There is a table on this page matching those limits to a compression level.

On most sites your file is uploaded to a server first, which is worth thinking about when the document is a passport scan or a payslip. Here it is not. The compression runs in your own browser, so nothing is transmitted. Load the page, switch off your wifi, and it still works.

It depends which level you pick, and the tool tells you before you commit. Lossless changes nothing visually at all. The raster levels turn pages into images at a set resolution, so text becomes slightly softer as you go down and images lose fine detail. Balanced is the setting most people find invisible in normal reading.

It rebuilds the file structure and strips out unused objects without touching a single page. Text stays selectable, searchable and copyable, and nothing is re-encoded. The saving is smaller, usually 5 to 20%, but it is the right choice for anything you will need to search or copy from later, like a contract or a report.

Because you used one of the raster levels. Those redraw each page as a picture, which is exactly how they get the file so much smaller, but a picture of text is no longer text. If you need to search or copy from the document afterwards, use Lossless instead and accept a smaller saving.

Usually because it was already compressed. A file exported straight from Word or generated by a modern app often has little slack left in it. Scans, on the other hand, tend to shrink dramatically, because a raw photograph of a page is very inefficient to begin with. If Lossless barely helps, try Balanced.

Up to 100 MB. That ceiling exists because the work happens in your device’s memory rather than on a server. A very large file on a phone may struggle where a laptop copes fine, and being told the limit up front is better than a tab that quietly crashes.

No, at no point. There is no upload step in this tool. Your document is never transmitted, never stored and never seen by us, so there is nothing on our side to leak or hand over. That is a different promise from "we delete your file afterwards".

No. There is no software to install, no Acrobat, no Creative Cloud subscription and no account. The compression happens in the browser you already have open.