Category: Tips & Productivity

You try to attach a PDF to an email and get the dreaded message: “This file exceeds the maximum size.” Or the portal where you must submit your documents only accepts 2 MB files. Compressing a PDF solves the problem in seconds, and when it’s done well the quality difference is barely noticeable.

Why Some PDFs Are So Large

A PDF’s size depends mainly on what’s inside it:

• High-resolution images: 12-megapixel photos or 600 dpi scans take up a lot of space.
• Unoptimized scans: every page is a full image.
• Fully embedded fonts instead of just the characters used.
• Hidden elements: layers, thumbnails, metadata or earlier versions of the document.
• Complex graphics exported from design software.

How to Compress a PDF With PDFcrea

1. Open the Compress PDF tool.
2. Upload your file.
3. Choose the compression level: more compression means lighter files but slightly softer images.
4. Click Compress and wait a few seconds.
5. Download the result and compare its size with the original.

Tip: always start with the recommended level. Only if the file is still too large should you try maximum compression.

Which Compression Level to Choose

Level	Result	Best for
Low	Nearly identical quality, moderate reduction	Documents for print or with important photos
Recommended	Good balance between size and quality	Emailing, uploading to portals
High	Very light file, softer images	Messaging apps, forms with strict limits

Tricks for Lighter PDFs From the Start

Scan smart

For text documents, 150-200 dpi in grayscale is plenty. Scanning in color at 600 dpi multiplies the size without adding anything.

Shrink images before inserting them

If you build the document in Word or PowerPoint, use the app’s own compress-pictures option before you convert to PDF.

Remove what adds nothing

Delete blank pages or unnecessary appendices with Remove pages. Every page you drop is weight you lose.

Split if necessary

If a document is still huge after compressing it, consider splitting it into several parts.

Does Compression Reduce Quality?

It depends on the content. Text and vector graphics are hardly affected, because compression mostly works on images. Photos may lose some sharpness at high levels, but on screen the difference is usually minimal. If the document will be printed at a large size, use low compression.

Common Size Limits

Service	Approximate attachment limit
Gmail	25 MB
Outlook	20 MB
Job and government portals	Between 2 and 10 MB

These limits can change, but they’re a useful guide to how much you need to compress.

Frequently Asked Questions

How much can a PDF be reduced?

Image-heavy or scanned PDFs can shrink by 50-90%. Mostly text PDFs are usually light already and shrink less.

Is the text still selectable?

Yes. Compression doesn’t turn text into an image, so you can still copy and search it.

Can I compress the same file several times?

You can, but after the second pass the reduction is small and image quality gets worse. It’s better to pick the right level from the start.

Conclusion

Compressing a PDF is the fastest way to get past email and online form size limits. Choose the compression level based on how the document will be used and, when possible, optimize images at the source. Try the PDFcrea Compress PDF tool and lighten your files in seconds.

You open an important PDF and see a message like “The file is damaged and could not be repaired” or “Failed to load document.” Other times the file opens, but some pages are blank or full of strange characters. Don’t panic: in many cases a corrupted PDF can be repaired or at least most of its content can be recovered.

Why PDFs Get Corrupted

• Incomplete downloads: the connection dropped and the file was cut short.
• Copying errors: USB drives removed without ejecting or faulty SD cards.
• Badly encoded email attachments from some servers or older apps.
• Apps that crash while saving or generating the PDF.
• Disk failures or bad sectors.
• Unreliable creation software that produces files that don’t follow the standard properly.

Signs of a Corrupted PDF

Symptom	Possible cause
Won’t open and shows an error	Broken internal structure or incomplete file
Opens but some pages are blank	Damaged content on certain pages
Missing images or fonts	Corrupted embedded resources
File size is 0 KB	The file was never fully saved
Opens in one app but not another	Minor errors only some readers tolerate

How to Repair a PDF With PDFcrea

1. Open the Repair PDF tool.
2. Upload the damaged file.
3. Click Repair. The tool will try to rebuild the document’s internal structure and recover as many pages as possible.
4. Download the result and check the content page by page.

Tip: always work on a copy of the damaged file. If one method fails, you can try another on the original.

Other Steps You Can Try

Open it in another app

Browsers (Chrome, Edge, Firefox) and PDF readers use different engines. A file that fails in one sometimes opens fine in another. If it opens, print it to PDF or save it again to get a clean copy.

Download it again

If the PDF came from the internet or an email, download it once more. It’s the fastest fix for incomplete downloads.

Ask for a new copy

If someone else sent you the file, ask them to export it again. Often the problem is in the original file.

Look for earlier versions

Cloud services like Google Drive, OneDrive or Dropbox keep previous versions of files. You might find an intact copy.

What Can and Can’t Be Recovered

If the damage affects the document’s structure (the internal index that says where each page is), repair usually works very well. If actual data is missing because the file is truncated, only the pages that arrived complete can be recovered. In badly damaged files, sometimes only the text can be salvaged.

How to Keep Your PDFs From Getting Corrupted

• Always eject USB drives before unplugging them.
• Check the file size after downloading: if it’s suspiciously small, download it again.
• Keep backups in the cloud and on another device.
• Use PDF/A for documents you must keep long term. Convert them with PDF to PDF/A.
• Avoid editing the same PDF many times with different apps.

Frequently Asked Questions

Can every PDF be repaired?

Not always. It depends on the type and extent of the damage. Structural errors can usually be fixed; truncated files can only be partially recovered.

Does repairing change the content?

The tool tries to keep the original content. What may change is the internal structure, which is rebuilt so the file becomes valid again.

Can I repair a password-protected PDF?

You’ll need to know the password. If the file is encrypted and damaged, recovery is more difficult.

Conclusion

A corrupted PDF isn’t always a lost file. Try repairing it, open it with other apps and look for earlier copies before giving up. For the future, keep backups and use long-lasting file formats. Try to recover your document with PDFcrea Repair PDF.

A contract comes back “with a couple of minor changes.” Or you have two versions of a report and can’t remember which one is final. Reading both documents line by line is slow and it’s very easy to miss a changed number or word. Comparing two PDFs with a tool shows you the differences automatically.

Why Compare Documents

• Catch unannounced changes in contracts and agreements before signing.
• Review corrections in academic papers or translations.
• Control versions of quotes, catalogs and price lists.
• Verify that a final document matches what was approved.
• Save time reviewing long documents.

How to Compare PDFs With PDFcrea

1. Open the Compare PDF tool.
2. Upload the original document in the first box.
3. Upload the new version in the second.
4. Click Compare.
5. Review the highlighted differences: added, removed or modified text.

Tip: always put the older version on the left and the newer one on the right. That way you’ll interpret changes consistently.

What Kinds of Changes It Detects

Change	Example
Added text	A new clause in the contract
Removed text	A condition that disappears
Modified text	A different date, amount or deadline
Added or removed pages	A new appendix at the end

Where to Look Most Carefully

When comparing contracts and important documents, pay special attention to:

• Figures: amounts, percentages, penalties and interest.
• Dates and deadlines: delivery, payment, notice or term.
• Negations: a single “not” added or removed changes the meaning of a sentence.
• Names of the parties and identifying details.
• Appendices: sometimes the important changes aren’t in the main body.

Tips for a More Accurate Comparison

Compare documents with text

If one version is a scan, apply OCR first so the tool can read the text.

Remove what doesn’t matter

If you only want to compare one section, extract those pages from both documents and compare them.

Normalize the formats

If one version comes from Word and the other is a PDF, convert the Word file with Word to PDF so you compare two PDFs.

Comparing Doesn’t Replace Reading

Automatic comparison is a huge help, but it doesn’t interpret what the changes mean. With contracts and legal documents, once you’ve found the differences, read them carefully and consult a professional if you have doubts.

Frequently Asked Questions

Can I compare scanned PDFs?

Yes, although results are much better if you apply OCR to both documents first.

Does it detect formatting changes, like bold or colors?

The main goal is finding differences in content. Formatting changes may not be highlighted.

Does it work with long documents?

Yes. The longer the document, the more time you save compared with manual comparison.

Conclusion

Comparing two PDFs protects you from unexpected changes and saves hours of review. Use it before signing, when approving final versions and whenever you work with documents that pass through several hands. Try it with PDFcrea Compare PDF.