When a sales deck PDF too large to send is the problem, the cause is almost always oversized photos and screenshots, so the fix is to shrink those images, not to cut slides. Export the PDF, run it through a Medium or Small preset, check the size, and look at the slides. Here is which limit you are hitting and which setting answers it.
| What you are sending | The limit you hit | The Smol setting |
|---|---|---|
| Pitch deck by email to a personal Gmail address | 25 MB attachment limit; about 37% added by encoding | PDF preset Medium, then aim for 18 MB or less |
| Proposal to a company on Exchange | 10 MB default email size limit, body included | PDF preset Small, then aim for 7 MB or less |
| Deck uploaded to DocSend | 2 GB and 500 pages per document | Rarely needed; Large or Original keeps slides sharp |
| Image-heavy deck for a screen share or print | Your own quality bar, not a cap | PDF preset Large, then compare slides |
| Proposal with your name in the file properties | Document properties travel with the PDF | Strip metadata as its own operation |
Sales deck PDF too large: why does it happen?
Photos, screenshots and product shots drive the size, not the text. In our PowerPoint guide, a nine-slide test deck came to 41,010,934 bytes and 40,973,496 of them sat in the media folder, so slides and text were about 0.1% of the file. That deck used six synthetic 4,032 × 3,024 photos and a video clip, which is a fixture, not your deck, but the shape is typical.
The same thing happens after export. A 16:9 slide that shows a screenshot at the size of a postcard often carries the full-resolution original underneath. Fixing it means shrinking the images inside the PDF to roughly the size they are shown, which is what Smol’s five PDF presets do. See how to compress a PowerPoint on a Mac if you need to shrink the .pptx itself.
What are the email and DocSend upload limits?
Gmail stops at 25 MB for personal accounts, Outlook at 20 MB for internet accounts and 10 MB for Exchange by default, and the DocSend upload limit is 2 GB per document. Read the sources and check your recipient’s side too, since a corporate gateway can be stricter than your own.
| Where it goes | Limit | What it means for a deck | Source |
|---|---|---|---|
| Gmail (personal) | 25 MB | Above this Gmail inserts a Google Drive link instead of attaching the file | Google Help |
| Outlook, internet accounts | 20 MB | The limit covers the whole message, so the body counts too | Microsoft |
| Outlook, Exchange accounts | 10 MB | Default; an administrator can change it, so ask the recipient if unsure | Microsoft |
| DocSend, documents | 2 GB | Per document upload, on every plan in the table | Dropbox help |
| DocSend, pages | 500 pages | Per document; far above any sales deck | Dropbox help |
Email adds overhead. Our email guide measured about 37% from encoding, so divide the cap by 1.37: roughly 18 MB for a 25 MB limit and 7 MB for a 10 MB limit. The full arithmetic is in getting a PDF under Gmail’s 25 MB limit.
How do I reduce pitch deck size without blurry slides?
Choose the lightest preset whose slides still look right at full screen. Smol’s presets cap the long edge of images at 600, 900, 1200, 1800 or 2400 pixels, so start at Medium and step up if a screenshot looks soft. The table below gives starting points, not guarantees.
| Preset | Long-edge cap, JPEG quality | Try it for |
|---|---|---|
| Tiny | 600 px, about 25 | Last resort for a tight gateway; expect soft slides |
| Small | 900 px, about 45 | Text-light proposals going through a 10 MB gateway |
| Medium | 1200 px, about 60 | Starting point for most decks sent by email |
| Large | 1800 px, about 75 | Photo-heavy decks viewed full screen |
| Original | 2400 px, about 88 | Maximum fidelity; still re-encodes, not lossless |
These are pixel caps, not DPI targets, so the effective resolution depends on page size. As an illustration, a 1800 px cap on a slide that fills 10 inches is 180 pixels per inch. Microsoft’s own advice for shrinking a presentation is to pick a default resolution of 150 ppi or lower (read 11 October 2026), which is the same trade at the source.
Smol does not promise an output size. Run it, read the new size, and if it is still over your target, go one preset down and compare. Some PDFs, such as ones from certain report generators, barely shrink at any preset. For a scanned deck, read compressing a scanned PDF without killing OCR.
How do I compress a sales deck PDF on a Mac?
Export the deck to PDF from your presentation app, drop the PDF into Smol, pick a preset, run it, and check the new size and a few slides. Smol writes a copy with a _compressed suffix and leaves the original alone by default.
Export the deck to PDF
Use your presentation app’s export. Keep the editable file; you are compressing the PDF copy.
Drag the PDF into Smol
Drop a whole folder if you have several decks or proposals. Mixed file types work in one batch.
Choose Medium, or Small for a 10 MB gateway
Presets are saved on your Mac. If the team shares a standard, write the choice down and recreate it on each Mac.
Run it and read the size
Smol shows the saving per file. Compare to the cap from the limits table, including the 37% email overhead.
Flip through the slides
Check screenshots, logos and small chart text at full screen. If anything is soft, rerun one preset higher.
Strip metadata if the file carries your internals
Use the strip-metadata operation to clear document properties. No PDF preset does this for you.
How do I send a proposal PDF safely?
To send proposal PDF files safely, compress, strip the document properties, check the size against the recipient’s limit, then send. A proposal often holds pricing and client names, so avoid web compressors that receive the file on someone else’s server. Smol is offline and has no account.
- Document properties such as author and title can reveal who built the file. Clearing them is reversible with a free tool unless the file is rewritten afterwards; see removing metadata from a PDF on Mac.
- Smol does not redact, sign, merge or split PDFs. Do those in your usual tool before compressing.
Handling client contracts too? See confidential documents and consultants’ reports.
What can I use today to shrink a pitch deck?
Free options come first. PowerPoint and Keynote can shrink images inside the file before you export, and DocSend or a link avoids the email cap altogether. Each has a catch.
| Option | What it does | Catch |
|---|---|---|
| PowerPoint Compress Pictures | Lowers picture resolution inside the file; set a default of 150 ppi or lower | Works on the .pptx, not a PDF you already exported (Microsoft) |
| Keynote Reduce File Size | Scales images and can re-encode movies | Apple warns some combinations can make the file larger (Apple) |
| Preview Reduce File Size | Built into macOS | Can enlarge text PDFs: 111.8% on a 21-page contract in our test (details) |
| Share a link (DocSend or a drive) | Skips the email cap; DocSend takes up to 2 GB | Recipients must click, and some prospects want an attachment |
| Smol | Five PDF presets on a finished PDF, offline, $29 once | No size target for PDFs; check the result |
For other tools, see the best PDF compressor for Mac and Acrobat alternatives.
When Smol is the wrong tool
Smol suits a finished PDF. It is the wrong choice in these cases:
- You need to edit slides. Smol does not edit PDFs; change the deck in your presentation app, re-export, then compress.
- You need pixel-identical output. Even Original re-encodes and resamples above 2,400 pixels, and there is no lossless mode for images.
- The deck embeds video. Compress the clip first or link to it; DocSend takes video up to 2 GB.
- You are on Windows or a phone. Smol is macOS only.
- You need redaction, signing, OCR or page merging. None of those exist in Smol.
Teams and pricing
Solo is $29 once for one Mac. Team is $49 once for three Macs. Enterprise is $20 per seat, once, for 5 to 500 seats. There is no subscription, and no free trial. See pricing.
Frequently asked questions
Sales deck PDF too large to email: what causes it?
Images and screenshots carry the weight. In our PowerPoint test deck, 40,973,496 of 41,010,934 bytes were media. Gmail stops at 25 MB, Outlook at 20 MB for internet accounts and 10 MB for Exchange by default, and encoding adds about 37%. Shrink the images with a PDF preset, then check the new size before sending.
What is the DocSend upload limit?
Dropbox’s DocSend help lists 2 GB per document upload and 500 pages per document on every plan in its table, with video at 2 GB and audio at 1 GB. Most sales decks are far below that, so the limit you hit is usually your recipient’s email, not DocSend. Read the help table before relying on it.
How do I reduce pitch deck size on a Mac?
Export the deck to PDF, drop it into Smol, choose the Medium preset, and run it. Smol writes a copy and keeps the original by default. Compare the new size with your limit, then flip through the slides. If a screenshot looks soft, rerun with Large; if it is still too big, try Small.
What is a good pitch deck file size?
There is no universal figure. Aim below your recipient’s limit after email overhead: about 18 MB for Gmail’s 25 MB cap and 7 MB for a 10 MB gateway. For a link on DocSend the cap is 2 GB, so quality matters more than bytes. Check the output size rather than trusting any preset to hit a number.
How do I send proposal PDF files that are over the limit?
Compress it first, and if it is still too big, send a link. Gmail swaps oversized attachments for a Google Drive link on its own. In Smol, use Small for a 10 MB gateway, check the result, and strip the document properties so author and title do not travel with the file. Send the compressed copy.
Will compressing make my slides blurry?
It can. Presets cap image pixels at 600 to 2400 on the long edge, so Tiny will look soft on a large display while Large rarely does. Start at Medium, view slides at full screen, and step up if logos or small chart text look rough. Presets are pixel caps, not DPI targets, so results depend on page size.
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