You don't need a smaller PDF. You need one under a specific number — 25 MB for a Gmail attachment, 10 MB for a job-application portal, 5 MB for a client's upload form, 2 MB because some government site from 2009 says so. "Make it smaller" isn't the task. "Get it under X" is.
That's the gap in almost every compressor: they give you presets — Low / Medium / High, or "Basic / Strong" — and leave you to guess. You pick Medium, get 7.3 MB, still over the 6 MB limit, try High, now it's a blurry 4 MB, and you've uploaded your document to a random website twice to find out.
This is a short guide to compressing a PDF to a size you choose, exactly — for free, with no account.
5 for 5 MB.No signup, no watermark, and the file (and result) auto-delete within 12 hours.
A preset compresses by a fixed recipe regardless of your file. The same "Medium" setting turns a 40 MB scanned report into 12 MB and a 3 MB deck into 2.9 MB — neither of which might be the number you actually need. You're optimising a knob when you have a budget.
Target-size compression inverts it: you state the budget, and the tool works backwards to hit it. Under the hood, SourceBack:
target, keeping the highest quality that still fits, and
your document to a picture.
If a target is so small it's only reachable by rasterising the pages (turning text into an image), the tool tells you that up front and lets you choose — it doesn't silently wreck your document to hit a number.
Being fair about the alternatives, because it matters:
| Free preset compressors | Paid "target size" tools | SourceBack | |
|---|---|---|---|
| Compress to an exact MB target | ✗ (presets only) | ✓ | ✓ |
| Free | ✓ | usually paid / trial-capped | ✓ |
| No signup / no watermark | varies | often account required | ✓ |
| Keeps text selectable | varies | varies | ✓ (until you opt into rasterising) |
| Tells you when the target isn't safely reachable | ✗ | rarely | ✓ |
| Auto-deletes your file | varies | varies | ✓ (12h) |
The big names — iLovePDF, Smallpdf — are excellent at bulk and own the head-term "compress pdf" traffic; if you just want "smaller," they're right there. The point of a target-size tool is the specific job they don't do for free: hit a number, exactly, without paying or signing up.
Set the one you need and skip the trial-and-error.
Will the quality be bad? It keeps the highest quality that still fits your target — it only compresses as much as it has to. For a modest target on an image-heavy PDF the difference is usually invisible on screen; for an aggressive target you'll see softer images, which is the honest trade-off of asking for a small file.
Does the text stay selectable / searchable? Yes — it compresses the images and structure, not the text, so text stays selectable. The only exception is if you choose to rasterise pages to force a very small target.
Is it really free, with no account? Yes. The compressor is free with no signup — it's how most people first meet SourceBack.
Is my file private? Your upload and the compressed result auto-delete within 12 hours, and nothing is reused.
Compress a PDF to an exact size now — free, no signup: sourceback.app.