Compress PDF

Typically 5 to 30 percent, depending on how the source was written. PDFs exported from Word or a design tool often carry redundant objects that object stream compression folds away. A file that was already optimized may only drop a few percent.

A scan is essentially a stack of photographs, and this tool doesn't recompress raster images in the browser. The structural cleanup still runs, but pictures dominate the total. Convert the pages with PDF to JPG, squeeze them in Image Compressor, then rebuild with JPG to PDF for a much bigger cut.

Yes. The file is processed entirely in your browser with the pdf-lib library and never touches a server. Close the tab and nothing remains anywhere but your own machine.

There's no sign up, no watermark, and no page limit beyond the 100 MB upload cap. The compression is lossless, so the output is your same document, just written more efficiently.

No. Object stream compression is lossless: text, fonts, vector graphics, and images look identical afterward. That's also why the savings are moderate, since nothing gets downsampled or re-encoded.

Run them through this tool once. Text-heavy files respond best to structural compression because their bulk is object overhead rather than imagery. If the result still misses a limit, break the document up with Split PDF and send it in parts.

It will attempt to load encrypted files, but re-saving them can fail or produce a broken document. Remove the password first with Unlock PDF, compress the result, then add the lock back with Protect PDF if you need it.

Yes. The compress pdf online step runs in your browser with pdf-lib, so the document never touches a server. To reduce pdf file size online this way, drop the PDF, press Compress, and compare the Original and Compressed numbers before you download.

Press Compress once. The tool re-saves your document with object stream compression, a lossless cleanup that typically trims 5 to 30 percent, so reduce pdf size here means tidier structure rather than downsampled content. Text-first files like reports and invoices respond best.

There's no exact-size target field, so compress pdf to 100kb isn't a guarantee this tool can make. Because the compression is lossless, a text-heavy file might land near compress pdf to 50kb while a scan won't come close. The result depends on what's inside, not a number you type.

No, and here's why. A pdf compressor to 150kb would need to downsample the images inside, which this tool leaves untouched. To aim at pdf compressor to 250kb for a scanned file, convert the pages with PDF to JPG, shrink them in Image Compressor, which has a target size slider, then rebuild with JPG to PDF.

It depends entirely on the source. A short text document might drop under compress pdf to 500kb easily, but a pdf compressor under 50kb target is unrealistic for anything with fonts and graphics, since lossless compression can't delete real content. The tool shows you the actual result so you can judge it against your limit.

Use the image workflow for a hard budget. To compress 100kb pdf or compress pdf upto 400kb reliably, the bulk is usually scanned imagery, so run PDF to JPG, then Image Compressor with its max-size slider, then JPG to PDF. That chain controls the byte count in a way structural compression alone can't.

Compress pdf to 500kb online is achievable for many text documents in a single pass here. Compress pdf to 2kb, though, isn't realistic for a real page; even a nearly empty PDF carries structural overhead above that. Aim for a target the content can physically reach.

Only the file size. This tool won't reduce pdf pages, meaning it doesn't drop any pages from the document; every page stays. If your goal is fewer pages, the Delete PDF Pages tool removes the ones you don't need, which often shrinks the file more than compression does.