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50

Bulk Compress PowerPoint Files Online

Reduce PPTX file sizes by compressing embedded images.

Drop up to 50 presentations at once — no install, no sign-up required.

Drop PowerPoint Files to Compress

25 MB per file Up to 50 files 3 parallel 1 credit each

Encrypted EU Servers Auto-delete 1h

⚡ Median time per slide (last 10k jobs): 103ms
Resize Embedded Images: Off

How it works

Drop your files

Drag & drop or choose PowerPoint files. No account required.

We optimize carefully

→ Smaller files, no visible quality loss
→ Encrypted in transit & at rest
→ EU servers, auto-deleted in 1 hour

Download optimized PPTX

→ Individually or as a single ZIP
→ Auto-deleted after 1 hour

About PowerPoint Compression

PowerPoint presentations often become bloated with high-resolution photos across dozens of slides. Our compressor optimizes these embedded images without affecting slide layouts, animations, or text.

How PowerPoint Compression Works

  • Image Extraction: We unpack the PPTX and compress all embedded images.
  • Image Compression: Photos are compressed with JPEG compression. Transparent graphics stay as PNG.
  • Preservation: Animations, transitions, speaker notes, and all formatting remain intact.
  • Full Compatibility: Output works in Microsoft PowerPoint, Google Slides, Keynote, and other presentation software.

Best For

Photo-heavy presentations, training decks, sales pitches with product images, and any presentation that exceeds email attachment limits.

Frequently Asked Questions

How do I reduce PowerPoint file size for email?

Drop your .pptx file here and we'll compress embedded images instantly. Presentations with photos typically see 50-80% reduction. A 50 MB presentation with full-screen photos often compresses to 10-15 MB—well under most email limits.

Are my PowerPoint files private and secure?

Yes. Your presentations are encrypted in transit (TLS 1.3) and at rest (AES-256), processed exclusively on EU servers, and automatically deleted after 1 hour. We never view, share, or store your files beyond the processing window.

Why are PowerPoint files so large?

PowerPoint stores images at their original resolution, even if you resize them on the slide. A 12-megapixel phone photo remains 12 megapixels inside the file. Multiply by 20+ slides and you easily hit 100+ MB. Our compressor optimizes images for screen display while maintaining visual quality.

Will compression affect my animations and transitions?

No. We only modify embedded image data. All animations, transitions, timing, speaker notes, audio, video, and slide layouts are preserved exactly. Your presentation will play identically after compression.

Can I compress .ppt files (legacy PowerPoint)?

We only support the modern .pptx format (PowerPoint 2007 and later). To compress older .ppt files, open them in PowerPoint or Google Slides and save as .pptx first. This also gives you access to newer PowerPoint features.

How much can I reduce a PowerPoint file's size?

Photo-heavy presentations: 50-80% reduction. Presentations with screenshots: 40-60% reduction. Mostly text/charts: 10-30% reduction. The more photos your presentation contains, the more dramatic the compression.

Does compression work with embedded videos?

We currently focus on image compression only. Embedded videos are passed through unchanged. For video-heavy presentations, consider using video compression tools separately. Images are usually the primary contributor to file size anyway.

Will my slide masters and templates be preserved?

Yes. Slide masters, custom layouts, themes, color schemes, and fonts are all preserved. We only touch the binary image data embedded within these elements—the structure and formatting remain identical.

What are the file size and batch limits?

TierMax File SizeMax Files/BatchParallel Jobs
Guest/Free25 MB50 files3 at once
Pro200 MB200 files6 at once
Business1 GB1000 files10 at once

Note: Batch and parallel processing limits apply site-wide across all compressors.

How are credits calculated for compression?

Cost: 1 credit each

How it works:

  • Files up to 25 MB: 1 credit (minimum)
  • 26-50 MB: 2 credits
  • 51-75 MB: 3 credits
  • 76-100 MB: 4 credits
  • Over 1000 MB: 40 credits (maximum cap)

Example: A 5 MB file = 1 credit. A 95 MB file = 4 credits.

Why per-megabyte? Larger files require more processing resources (memory, CPU, bandwidth, storage).

What are my daily and monthly credit limits?

Credit allocations vary by account tier:

TierCreditsReset
Guest50/dayMidnight UTC
Free50/dayMidnight UTC
Pro10,000/monthBilling cycle
Business30,000/monthBilling cycle

Note: With 1 credit per file, Guest/Free users can compress 50 files per day. Pro users can compress 10,000 files per month.

Answers at a Glance

Quick answers to common questions.

Choose Your Plan

One subscription unlocks the entire Tools.FAST Network. Plans cover Compress.FAST, Convert.FAST, PDF.FAST (soon), and all future tools.

Monthly Annual 4 Months Free

Free

$0

For occasional personal use

  • 25 MB per file
  • 50 files per batch
  • 3 parallel jobs
  • 50 credits/day
  • Standard priority
  • Email support
Sign Up Free

No sign-up required. Create an account for your own credit pool.

Popular

Pro

$9 /month

For independent work

  • 200 MB per file
  • 200 files per batch
  • 6 parallel jobs
  • 10,000 credits/month across Tools.FAST
  • High priority
  • Email & chat support
  • One subscription for the entire Tools.FAST network

Business

$19 /month

1 seat

For production scale

  • 1 GB per file
  • 1000 files per batch
  • 10 parallel jobs
  • 30,000 credits/month across Tools.FAST
  • Add seats to invite team members
  • Highest priority
  • Priority email & chat support
  • One subscription for the entire Tools.FAST network

How Credits Work

  • Usually 1 credit per file. Exact cost shown before you start.
  • Credits refresh monthly on your billing cycle.
  • Unused credits roll over, capped at your plan's monthly amount.
  • One subscription, all sites. Works across Compress.FAST, Convert.FAST, and future tools.
View all Compress.FAST limits by tier → View all Convert.FAST limits by tier →

What's New in PowerPoint Compressor

Latest improvements to this compressor

Last updated December 26, 2025
Dec 26, 2025

Initial release with slide image compression.