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Shrink a deck to the size its slides need, slide by slide.

To compress a PowerPoint deck, every picture is measured where it is placed. A photo shown 3 inches wide does not need 4,000 pixels. Pictures are resized to that size at the resolution you pick, unused media is dropped, and the text, layout, animations and macros stay byte for byte.

upload_fileChoose decksphoto_libraryPhoto deckslideshowText deck

11 formatswhat happens to each

Compressed here7 formats.pptx.pptm.ppsx.ppsm.potx.potm.odpPictures resized to where they are shown; slide XML untouched.

Convert first3 formats.ppt.pps.potBinary 97-2003 files. Convert to the X version, then compress.

Exported slidesimages.jpg.pngSent to the Image Compressor, one picture at a time.

quality preset

Fastq30 · 96 dpiNormalq50 · 150 dpiMaximumq70 · 220 dpiUltraq85 · full px

resolution at the size shown

96screen150projector220retina300printoffkeep px

Compress picturesresize and re-encode JPEGsPhoto PNGs to JPEGcharts and logos stay PNGRemove unused mediafiles no slide points to

photo_libraryteam-offsite.pptxPPTX · 10 slides · 8.4 MBFull-bleed photos straight from a camera, one cropped to a square, a 4,032-pixel photo shown 3 inches wide, a dashboard screenshot, and an old cover photo no slide uses any more.Compress this deck →

slideshowq2-review.pptxPPTX · 4 slides · 39 KBText, a table, speaker notes, a link and one flat-colour chart. Shows how little a text deck has to give.Compress this deck →

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Where the weight sits

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beforeafterBars share one scale. Click a slide to list its pictures.

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Checked after compressing

Slide, layout, theme and notes XML are copied unchanged, so text, tables, shapes, transitions and animations cannot move. Only picture files and, for converted PNGs, their file names change.

Show all pictures

picture · what changedshown onbeforeafter

No pictures on this slide. Its size is text and layout, which is already small once zipped.

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A photo deck and a text deck, at every preset

Both sample decks compressed at all four presets, plus a plain repack that leaves the pictures alone. The photo deck has 10 slides, 6 of them with photos, and one picture no slide uses. The text deck has 4 slides and a single chart.

Builds the two sample decks in this browser and compresses each one five times. Takes a few seconds.scienceMeasure both decks

settingwhat it doesphoto deck · 8.4 MBtext deck · 39 KB

Repack onlypictures untouchedEvery part deflated again; no picture changed.not measurednot measured

FastJPEG q30 · 96 dpiResized to the size shown at 96 dpi, then JPEG q30.not measurednot measured

NormalJPEG q50 · 150 dpiResized to the size shown at 150 dpi, then JPEG q50.not measurednot measured

MaximumJPEG q70 · 220 dpiResized to the size shown at 220 dpi, then JPEG q70.not measurednot measured

UltraJPEG q85 · full pixelsKeeps every pixel; only re-encodes and drops unused media.not measurednot measured

Placement matters more than qualityThe 4,032-pixel photo shown 3 inches wide shrinks the most: at 150 dpi it needs only 450 pixels across. Quality settings alone, as in Ultra, cannot reach that.

Unused media is free spacePowerPoint keeps a replaced or deleted picture in the file until it is saved with “Compress Pictures”. Removing it costs nothing visible.

Charts stay sharpFlat-colour PNGs such as charts and logos are kept as PNG, because JPEG blurs their edges. Only photos saved as PNG are converted.

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