Compress PDF for Email Attachments
Shrink PDF attachments so they never bounce. Preconfigured to a safe 10 MB target that works reliably across Gmail, Outlook, Yahoo, and corporate mail gateways — 100% private in-browser.
PDF compression tool
Penting: Jika PDF akan diberi tanda tangan elektronik atau e-Meterai, lakukan kompresi sebelum proses penandatanganan. Perubahan pada file setelah ditandatangani dapat memengaruhi validitas tanda tangan.
Choose Compression Profile
The engine runs FlateDecode stream re-compression and raster quantization entirely inside your browser.
Optimizing Your Document...
Analyzing document structure and embedded raster streams...
0%Berjalan 100% di browser — tidak ada data yang meninggalkan perangkat Anda
PDF Anda Siap
Pages were rasterized to meet the strict target threshold target. Teks, tautan, dan bookmark tidak lagi aktif pada hasil ini.
Compression Error
Kami tidak dapat memproses PDF ini. Periksa apakah dokumen dilindungi kata sandi atau rusak.
100% Private: your files are processed directly on your device and are never uploaded to any server.
Overcome Email Attachment Size Limits
Oversized attachments are the most frequent cause of undelivered emails. Scanned reports, portfolios, brochures, and contracts frequently exceed 15 MB to 30 MB. Because email servers re-encode files with Base64 MIME overhead (+33% size increase), keeping attachments under 10 MB guarantees that your message reaches recipients on Gmail, Microsoft 365, Apple Mail, and corporate firewalls without bouncing.
How to compress a PDF for email in 3 simple steps
- 1
Select your PDF document
Drag and drop your file into the tool or browse your files. Documents up to 100 MB are supported with instant, local browser processing.
- 2
Automatic 10 MB target applied
Target File Size mode defaults to 10 MB — the universal safety threshold that accounts for Base64 email encoding overhead. You can easily adjust the target to 5 MB or 2 MB for stricter enterprise servers.
- 3
Download and attach to your email
Review the compressed size and quality, download the document, and attach it to your email message without risk of bounce-back errors.
Email Provider Attachment Limits vs Recommended Target
| Email Provider | Stated Limit | Effective Limit (MIME Overhead) | Recommended Safe Target |
|---|---|---|---|
| Gmail / Google Workspace | 25 MB | ~18 MB | ≤ 10 MB |
| Microsoft Outlook / Office 365 | 20 MB | ~15 MB | ≤ 10 MB |
| Yahoo Mail | 25 MB | ~18 MB | ≤ 10 MB |
| Apple iCloud Mail | 20 MB | ~15 MB | ≤ 10 MB |
| Corporate & University Gateways | 5 – 10 MB | ~3.7 – 7.5 MB | ≤ 5 MB |
Email PDF Compression FAQs
Why do email providers reject PDF attachments under 25 MB?
Although services like Gmail and Yahoo advertise a 25 MB attachment limit, email protocols encode attachments using Base64, which inflates binary file size by approximately 33%. A 20 MB PDF actually becomes ~27 MB during transmission, exceeding the server threshold and causing bounce errors. Setting a target of 10 MB guarantees reliable delivery across all email providers.
What are the attachment limits for popular email providers?
Gmail: 25 MB; Microsoft Outlook / Hotmail: 20 MB; Yahoo Mail: 25 MB; Apple iCloud Mail: 20 MB; Corporate Exchange and academic servers: frequently capped at 10 MB or 5 MB.
Are confidential business documents or contracts uploaded to your servers?
No. All compression operations run locally inside your web browser via WebAssembly. Neither contracts, financial reports, legal filings, nor personal resumes are ever sent over the network to external servers.
Will text in compressed PDFs remain searchable and printable?
Yes. Our engine optimizes embedded images, fonts, and object streams while preserving selectable text, vector shapes, bookmarks, and links.