Merge Google Docs and Compress the PDF
Merging several Google Docs can produce a large PDF if the source documents contain high-resolution images or complex layouts. Compressing the merged PDF reduces the file size so it fits within email attachment limits and downloads faster.
Why merged PDFs can be large
Each document contributes its full content to the merged file. High-resolution images, embedded fonts, and detailed charts all add to file size. A merger of ten image-heavy Docs can produce a file over 50MB, which exceeds most email attachment limits.
Compressing with the extension
The Docs to PDF extension includes a compress option that reduces image resolution in the PDF to a level appropriate for screen viewing or standard printing. Enable compression before running the merge and the output file will be smaller than a standard export.
Compression trade-offs
Compression reduces image quality. For documents going to print, use the uncompressed version. For documents shared digitally as email attachments or web downloads, compressed output at 150 DPI is usually sufficient and reduces file size by 50 to 70 percent.
Compressing after the merge
If you have already merged and the file is too large, free tools like PDF24 and Smallpdf can compress a PDF without re-merging. Upload the merged file, apply compression, and download the smaller version.
Frequently Asked Questions
What compression level should I use for email attachments?
For email, aim for a file size under 10MB. Medium compression at around 150 DPI usually achieves this for typical business documents. High compression at 72 DPI is suitable for documents that will only be read on screen.
Does compression affect text readability?
Text in PDFs is vector-based and is not affected by image compression settings. Readability of text is preserved at all compression levels. Only raster images and photo content are visibly affected.
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