Upload the PPTX
Bring the ordinary PowerPoint export you want to reduce. It is processed in memory.
Gixo Lumen · deterministic document conversion
Compress a PowerPoint without rasterising the deck you still need to edit.
Upload an ordinary PPTX and get a measured before-and-after report. The compressor rewrites supported raster image parts only, then verifies that native text, tables, layouts, and masters still round-trip.
Editable slides, not screenshots
Free preview, no account required
Structure read from your source
Your wording kept
Measured PPTX compression report
Bring in
PowerPoint export
Get back
A measured editable PPTX compression report
An ordinary PPTX export from PowerPoint, Canva, Google Slides, or another editor.
Review every slide in the browser for free, without an account. Sign in only when you want to download PPTX or PDF.
A converter, not a prompt box
Turn the structure you already have into a slide preview.
Compression is a package operation, not a screenshot export. The browser preview makes the editability contract visible before sign-in download.
The conversion step is deliberately structural. It extracts the source, identifies headings and blocks, and splits long sections into readable slides — it does not paraphrase your source or invent a narrative around it. Rewriting, restructuring and theming are separate, opt-in steps you take afterwards on the canvas.
Free preview: convert and inspect the complete deck in your browser without an account. Sign in is the download boundary for PPTX and PDF.
How it works
Three bounded steps from PowerPoint export to slides.
Rewrite images only
Supported image parts are recompressed or resized when that produces a smaller safe package.
Verify the round-trip
The result is reopened and compared for slide text, tables, layouts, and masters before it is offered.
Source rules
What the converter reads from PowerPoint export.
The package is validated before inspection. JPEG and PNG image parts may be recompressed or resized when the safe candidate is smaller; editable slide content is never rasterised.
Measured output
The report shows source size, output size, image counts, and whether editable structures survived.
Safe candidate
If a rewrite is not smaller, the original image or the original package is retained.
Editable first
The output is accepted only when the inspector sees the same native slide text, tables, layouts, and masters.
Output behavior
What stays faithful, and what does not.
Preserved or represented
- Native text and tables
- Slide layouts and masters
- Measured source and output sizes
- Image parts that can be safely recompressed
Outside this batch
- Silent rasterisation of editable content
- A guarantee that every image format gets smaller
- AI rewriting or narrative changes
Supported formats & specifications
The contract we can state today.
PPTX input cap: 5 MiB. On a 1.34 MB, 2-slide, 1-image Release fixture, output was 488.91 KB (64.4% smaller); 30-run median 51.14 ms, p95 55.70 ms. One JPEG was recompressed; quality is not a universal guarantee.
| Aspect | Current behavior |
|---|---|
| Input | PowerPoint export |
| Result | A measured report, editable slide-content preview, and an optional safe PPTX download. |
| Free vs signed in | The report and preview are free without an account. Sign in to download the resulting PPTX or PDF, apply a brand kit, or use AI restructuring. |
| Measured limits | PPTX input cap: 5 MiB. On a 1.34 MB, 2-slide, 1-image Release fixture, output was 488.91 KB (64.4% smaller); 30-run median 51.14 ms, p95 55.70 ms. One JPEG was recompressed; quality is not a universal guarantee. |
| Extraction | Structural, not generative: headings, blocks and tables are read from the source rather than rewritten. |
| Safety | Uploads are validated and bounded-parsed. URL conversion accepts public HTTP/HTTPS pages only. |
What conversion does, and what it leaves to you
Structure is extracted. Judgement stays yours.
Conversion reads the structure already in your source and lays it out as slides. The report and preview are free without an account; sign in only when you want the resulting PPTX or PDF download, theming, or AI restructuring. Nothing is silently reworded between the file you brought and the deck you present.
A note about image quality: The compressor changes supported raster image parts only. Quality and reduction figures are reported from measured runs rather than promised as a universal percentage.
Current public contract
PowerPoint export to PowerPoint public contract
A short, explicit description of what this converter does and where the paid Lumen workflow begins.| Aspect | Current behavior | Why it matters |
|---|---|---|
| Input | PowerPoint export | The named source front-end determines which structural signals are read. |
| Review | Every slide is editable on the canvas before export. | You can inspect and correct the output before anything leaves the workspace. |
| Free preview | Full editable deck preview without an account. | Slide count, source-page count, and extraction warnings are visible before sign-in. |
| Export | PPTX and PDF after sign-in, with editable text and native tables. | Slides are rebuilt as real objects rather than flattened page images. |
| Method | Structural extraction and slide assembly, not paraphrase. | The same source structure produces the same conversion behavior. |
Will compression make my text editable?
It keeps the existing native text and tables; it never rasterises them.
What happens if the result is larger?
The original package is returned and the report says that no smaller safe rewrite was found.
Does this connect to Canva or Google Slides?
No. Export an ordinary PPTX first, then process that file here.
Does compression use AI?
No. Image rewriting and package verification are deterministic.
Questions people ask before converting
PowerPoint export to PowerPoint, answered plainly.
Will compression make my text editable?
It keeps the existing native text and tables; it never rasterises them.
What happens if the result is larger?
The original package is returned and the report says that no smaller safe rewrite was found.
Does this connect to Canva or Google Slides?
No. Export an ordinary PPTX first, then process that file here.
Does compression use AI?
No. Image rewriting and package verification are deterministic.
Ready to inspect the result?
Convert PowerPoint export to PowerPoint and review the slides before you export.
Reviewing is the point: you can see whether the source structure made a useful deck, and fix it on the canvas, before anything is exported.
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