PDF Too Large to Email?
Fix It in 30 Seconds. Free.
Gmail blocks attachments over 25 MB. Outlook caps at 20 MB. A scanned contract, proposal, or report can easily blow past those limits. Here's how to shrink any PDF small enough to email — without uploading it anywhere.
Attachment rejected
annual-report.pdf
38.4 MB — too large
⚠ Attachment blocked
Your attachment exceeds the 25 MB limit. Please reduce the file size and try again.
After compression
annual-report.pdf
3.8 MB · −90% · ✓
38.4 MB
Before
−90%
Saved
3.8 MB
After
0%
Average size reduction
Strong mode on scanned PDFs
0 MB
Gmail attachment limit
Outlook and iCloud cap at 20 MB
0
Files uploaded
Everything runs in your browser
Pro tip
Email Attachment Limits by Provider
Every major email provider has a hard cap on attachment size. Exceed it and your email simply bounces. The "safe" target is well below the advertised limit — once the entire email (headers, body, other attachments) is factored in.
Why Are PDFs So Large in the First Place?
Embedded high-res images
Scanned documents or photo-heavy reports embed images at print resolution (300+ DPI). A single scanned A4 page can be 2–5 MB uncompressed.
Unoptimised embedded fonts
PDFs embed complete font files — even if only 12 characters from a 400 KB font are used. Some PDFs embed 5–10 fonts, adding megabytes of overhead.
Redundant data streams
Many PDF generators duplicate content streams, embed full colour profiles, and include hidden layers or metadata that inflates the file with data the reader never uses.
No compression applied at export
Tools like Word or Adobe InDesign export PDFs with minimal compression by default. The file is 'safe' but unnecessarily large — compression wasn't a priority at creation time.
Compress your PDF for email right now
Free, private, and instant. Choose Balanced to keep text, or Strong for maximum savings.
How to Compress a PDF Small Enough to Email
Four steps. No account, no upload, no queue. Works on any PDF regardless of size.
Upload your PDF
Drag and drop your PDF into the upload zone on FileCrisp. The file stays in your browser — it's never sent to any server. Works on any device, no install needed.
Your file never leaves your deviceChoose your compression level
Pick 'Balanced' to keep text selectable while reducing size by 40–60%. Pick 'Strong' to maximise savings (50–90%) — pages become images, ideal for scanned documents.
Balanced = text stays. Strong = max savings.Compress
Hit Compress. FileCrisp processes the PDF page by page in your browser. For a 40-page document, this takes 5–15 seconds. You can watch the progress in real time.
No queue — starts instantlyDownload and attach
Your compressed PDF is ready. Download it and attach it to your email as normal. The file is complete and identical in content — just smaller.
Output: same content, smaller fileWhich Compression Level Should You Choose?
Less
Text-heavy docs, contracts, forms
Structural (Mode A)
10–40%
Balanced
Reports, presentations, mixed content
Structural + light rasterize
30–60%
Strong
Scanned docs, image-heavy PDFs
Full rasterize (Mode B)
50–90%
PDF Still Too Large After Compression?
Remove unused pages
If only some pages need to be sent, extract them first using a PDF editor or FileCrisp's upcoming page splitter.
Share via Google Drive or Dropbox link instead
Upload the file to cloud storage and send a link. Most email clients now show a preview. No attachment limit applies.
Compress at Strong level with the scanned PDF mode
If you originally used Balanced, switch to Strong — it converts pages to images at optimised DPI for 2–3× more savings.
FAQs
Frequently Asked Questions
Everything you need to know — answered plainly.
Make Any PDF Small Enough to Email
Free, private, and instant. No account needed — works on any PDF.