Compress PDF to 1MB — Free, No Upload

For attachment limits, keeping text when we can

Compress a PDF to 1MB or less for a portal or inbox that caps attachments. Many text PDFs shrink with selectable text left intact. Scans may still become images.

Strong compression turns pages into images

To hit a small target, each page may be saved as a JPEG. Text on those pages is not selectable or searchable, and a screen reader cannot read it. If the file already fits, the original text is kept.

Choose a PDF

Up to 50 MB. The file is read in this tab and is not uploaded.

Size or quality

Target size tries to finish at or under the limit. Quality level is a fixed setting when you do not have a number to hit.

Trying for 1 MB (10,00,000 bytes).

Best for photocopies and camera scans. Colour photos of documents get much smaller in gray.

A 1MB cap is a different problem from 100KB

College ERP portals, grievance forms, and older mail gateways often stop at 1MB while still expecting a readable multi-page file. On this page 1MB means 1,000 KB, which is 1,000,000 bytes — not 1,024 × 1,024. A result under that line also fits a system that treats 1MB as 1,048,576 bytes.

That budget covers many text PDFs and, with grayscale, often 10 to 20 scanned pages. It does not cover a photo album. If you only need the file under 1MB and the text matters later, stay on this preset: the structure pass runs first, and a digital letter or application can come back still selectable.

When the text survives

If the rewrite alone is under 1MB, we do not rasterise. The download is a normal PDF: find, copy, and screen readers keep working. The result says “text stays selectable” when that happens. If the file was a scan already, there was no text layer to save — the second pass only makes the pictures smaller.

Choosing 100KB “just in case” on a file the portal allows at 1MB is what destroys that text. Use the limit written on the form.

If 1MB is still too small

The original is probably a long colour scan or a slide deck full of photos. Split it into the parts the form asked for, turn grayscale on, and compress each part. We stop at about 60 DPI rather than invent a tiny unreadable PDF that happens to say 1MB.

Other target sizes

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How to use the Compress PDF to 1MB

  1. Add the PDF that the inbox or portal refused

    Up to 50 MB, processed locally.

  2. Leave the target at 1MB

    1MB on this page is 1,000 KB, or 1,000,000 bytes. Grayscale starts off because many files fit without it.

  3. Compress

    Digital PDFs are rewritten first so text can survive. Scans that are still too big are rebuilt page by page.

  4. Download the smaller PDF

    Use the original if you later need a version with selectable text and the result says the pages became images.

Compress PDF to 1MB FAQ

Which uploads use a 1MB cap?

Some college ERP portals, grievance forms, and older email gateways stop at about 1MB while still expecting a multi-page file. Your notice is the authority — if it says 200KB, this preset is too large and the portal will reject it.

Can selectable text survive compression to 1MB?

Yes, when the structure rewrite lands under 1,000,000 bytes. That is the usual outcome for a text-based form or letter. The result says the text stayed selectable. Image scans do not gain a text layer.

Is 1MB the same as 1,024KB?

Not here. This preset uses 1,000 KB = 1,000,000 bytes. A file under that limit is also under 1,048,576 bytes, so either definition of megabyte accepts it.

What if the best result is still over 1MB?

The page shows that size and does not claim success. Split the PDF, turn grayscale on, and compress the part you need to send. We will not go below about 60 DPI to force the number.

Is the attachment uploaded to you?

No. The file is processed by JavaScript inside your browser tab and never sent to our servers. Closing the tab clears it from memory.

Quick answers

Will compressing a PDF to 1MB remove selectable text?

Not always. One megabyte here is 1,000,000 bytes. The tool tries a structure rewrite first, and a digital form or letter often lands under that line with search and copy intact. The result says so when it happens. Pages become JPEG images only if the rewrite is still too big, which is common for camera scans and uncommon for text exports. Choosing a 100KB target on a file the portal allows at 1MB is what destroys the text. If the best readable copy is still over 1MB, the page reports that size. Split the document or enable grayscale instead of expecting an unreadable thumbnail to pass a clerk.