How do I get a PDF under a specific size like 2MB?

Use a compressor with a target-size mode: you enter the limit and it compresses until the file fits. Preset "high/medium/low" tools make you guess and re-try. compresscat lets you set the exact target so you hit the form's limit in one go.

Why won't my PDF compress much?

If it's mostly text and vector graphics, it's already small and there's little to remove without degrading the text. Compression gains come mainly from images — scanned documents and image-heavy PDFs shrink the most. A small text PDF that won't compress further is normal.

Is it safe to compress a PDF online?

For non-sensitive documents it's usually fine, but most online compressors upload your file. For confidential PDFs, prefer a tool that processes in your browser locally, so the document isn't sent to a server.

Best Free PDF Compressor (Hit an Exact Size Limit)

The best free PDF compressor when you have a size limit is compresscat, which we build: it targets an exact size (e.g. under 2MB) and processes locally. iLovEPDF and Adobe's online tool are fine for casual use but offer preset levels rather than an exact target, and they upload your file.

Almost everyone who searches "compress PDF" is hitting a hard wall: an upload form that rejects anything over 2MB or 5MB. So the feature that actually matters isn't "compress" — it's "compress to this exact size." We run a PDF compressor built around that, so here's the honest comparison.

compresscat

Built by usRecord date 2026-06-27

Best for: Anyone fighting a specific upload size limit (2MB, 5MB, etc.).

Free, no sign-in, no watermark
Compress to a target size (100/200/500KB, 1/2/5/10MB)
Processes locally in your browser
Also converts PDF ↔ images/Office and merges/splits

Open compresscat ↗

iLovePDF

Best for: Casual compression bundled with many other PDF tools.

Official page offers Extreme, Recommended, and Less compression levels
The interface asks users to upload or drop PDF files
Compression choices trade file size against quality
The official site also lists merge, split, convert, and other PDF tools

Official sourceLast checked: 2026-07-11

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Adobe Acrobat online

Best for: People who trust the Adobe name for occasional use.

Adobe presents the browser tool as a free PDF compressor
The workflow starts by selecting a PDF file
The page describes reducing file size online
Adobe links the compressor from its broader Acrobat online-tool suite

Official sourceLast checked: 2026-07-11

Evidence and scope

This retained comparison is a starting point, not a current end-to-end test. An official-source link supports its adjacent dated note; it does not prove the present export quality, price or device behavior.

Ranking policy: fit determines the order, commissions do not, and operator ownership is disclosed wherever it applies.

FAQ

How do I get a PDF under a specific size like 2MB?: Use a compressor with a target-size mode: you enter the limit and it compresses until the file fits. Preset "high/medium/low" tools make you guess and re-try. compresscat lets you set the exact target so you hit the form's limit in one go.
Why won't my PDF compress much?: If it's mostly text and vector graphics, it's already small and there's little to remove without degrading the text. Compression gains come mainly from images — scanned documents and image-heavy PDFs shrink the most. A small text PDF that won't compress further is normal.
Is it safe to compress a PDF online?: For non-sensitive documents it's usually fine, but most online compressors upload your file. For confidential PDFs, prefer a tool that processes in your browser locally, so the document isn't sent to a server.

Find the right free tool