📧 Optimized for Gmail, Outlook, Yahoo & Corporate Mail
Email Video & PDF Compressor
Easily shrink large videos and PDF attachments to fit under Gmail's 25MB limit, Outlook's 20MB ceiling, or strict corporate email firewalls. 100% private in your browser, no cloud uploads.
✓ 0 bytes uploaded · 100% client-side privacy
✓ Base64 safe margins to prevent email bounce-backs
✓ Hardware-accelerated video & smart vector PDF engines
🎬
Video Attachment
Target: ≤ 20MB / 15MB · Safe for All Mail Servers
Automatically compresses MP4, MOV, and screen recordings to stay under 20MB. Leaves ample headroom for email encoding overhead so your message is delivered without rejection.
Shrinks presentation decks, business proposals, contracts, and scanned reports. Intelligently optimizes embedded images while retaining text and document layout.
Compress video to 20MB or use Drive link if larger
Outlook.com / Office 365
20 MB – 25 MB
≤ 15 MB
Target 15MB to prevent corporate mail server bounce
Yahoo Mail
25 MB
≤ 20 MB
Compress raw video & documents to 20MB
Apple Mail (iCloud)
20 MB
≤ 15 MB
Under 15MB attaches directly; larger triggers Mail Drop link
Proton Mail
25 MB
≤ 20 MB
Compress encrypted attachments under 20MB for fast sync
Corporate Exchange / Firewalls
10 MB – 20 MB
≤ 8 MB – 10 MB
Use 8MB or 10MB preset to clear strict company security filters
Why do emails bounce even when the file is below 25MB?
Email systems transmit binary attachments using Base64 encoding, which expands the raw file by approximately 33% in transit. A 22MB video becomes almost 29MB in the message stream, triggering server rejection. Always aim for 15MB–20MB to guarantee delivery.
What is the maximum email attachment size limit for Gmail and Outlook?
Gmail and Yahoo Mail enforce a 25MB total attachment limit per email. Outlook.com and standard Exchange servers typically limit attachments to 20MB (and sometimes 10MB for strict corporate gateways). Apple Mail allows up to 20MB directly before prompting to use Mail Drop.
Why did my email bounce even though the attachment was under 25MB?
Email protocols (MIME) encode binary files (like MP4 videos or PDFs) into Base64 ASCII text during transmission. Base64 encoding adds approximately 33% overhead to the file size. Consequently, a 22MB raw file expands to roughly 29MB in transit, causing mail servers with a 25MB ceiling to reject or bounce the message. We recommend compressing attachments to 18–20MB for Gmail and 15MB for Outlook.
How do I compress a video to under 20MB for email without blurry quality?
Select the Video Attachment card on this page and choose the 20MB or 15MB preset. Our target-size bitrate calculator automatically computes the ideal video and audio bitrates using hardware-accelerated H.264 encoding, preserving crisp visuals and clear speech then check the actual output size before sending.
How does PDF compression work for business contracts and decks?
Our PDF engine analyzes document streams locally. Vector text, fonts, digital signatures, and formatting remain completely sharp and uncompressed, while high-resolution embedded photos or scans are re-sampled and optimized to bring the document under 5MB or 2MB.
Is it safe to compress confidential business attachments here?
Yes, 100% safe. NeatCompress operates entirely within your web browser using WebCodecs and WebAssembly. Zero bytes of your files are uploaded to any cloud or external server. Your sensitive NDAs, contracts, financial reports, and private videos never leave your computer.
