Convert PowerPoint from 16:9 to 4:3
Drop a widescreen deck and get it back in the standard 4:3 shape, for older projectors, classroom boards and templates that need it. Content scaled evenly, nothing stretched unless you ask. Free.
Three steps, done
Upload the 16:9 deck
Drop a .pptx. The current slide size is read and shown, e.g. 16:9 · 13.33 × 7.5 in.
Choose how to scale
Scale to fit shrinks everything evenly so it all stays on the slide. Scale to fill keeps the size and trims the sides. Stretch squeezes it to fit exactly.
Download the 4:3 deck
Press Convert and the 4:3 .pptx downloads: slides, layouts and masters all at 10 × 7.5 in.
Your deck, with a voice
Narrated PowerPoint
Every slide voiced by an AI voice, timed to auto-advance. Download the .pptx and press play.
Narrate every slide of my PowerPoint with a natural voice and give me the narrated .pptxMP3 narration
The whole deck as one clean audio file, or one clip per slide.
Read my PowerPoint aloud and give me the MP3Deck from a brief
Describe the talk. Noty writes the slides, designs them and narrates them.
Make me a narrated presentation aboutYour own voice
Clone your voice once and every deck sounds like you presenting.
Narrate my deck in my cloned voiceVideo export
SoonThe narrated deck rendered as an MP4 for YouTube, LMS or email.
Tell Noty you want videoFrom widescreen to a projector that wants 4:3
Before
A 16:9 deck on a 4:3 screen
Letterboxed with bars above and below, or cropped at the sides by a display that won’t switch.
After
A 4:3 deck, nothing cut off
Every slide, layout and master at 10 × 7.5 in, with shapes and pictures scaled evenly and centred.
New shape. Now a voice.
Tell Noty in the Studio chat and every slide gets a voiceover, timed to move on by itself, so the deck can run in the classroom or on a kiosk without a presenter.
What happens to your slides
Going from 16:9 to 4:3 makes the slide a quarter narrower at the same height. The tool changes the slide size, then moves and resizes every shape to match, in one of three ways.
Scale to fit
Every shape, picture and text box moves and resizes by the same factor, the one that keeps the whole slide visible, and the content is centred. Nothing is distorted or cut off; the new edges show the slide background.
Scale to fill
Everything grows by the factor that covers the whole new slide, then is centred. No empty edges, but content near the edges can end up partly off the slide.
Stretch
Positions and sizes are stretched across and down separately, so the layout fills the new slide exactly. Pictures, circles and icons change proportion, which is why it isn’t the default.
Why font sizes stay the same
Text boxes are resized, but the point size of the text is left alone. Scaling fonts by 0.75 would turn 18 pt body text into 13.5 pt, and it’s easier to enlarge a few titles by hand than to fix every text box that got too small. If a box is now too narrow, the text wraps onto another line.
Layouts and masters too
The slide masters and layouts are resized along with the slides, so new slides you add afterwards come out in the new shape with their placeholders in the right place.
Tables, groups and charts
Grouped shapes scale as a unit, table columns and rows scale with the table, and charts are resized as objects; their contents redraw at the new size.
Going to 4:3, three ways
PowerPoint’s Slide Size dialog does this too, when you have PowerPoint to hand. Its Ensure Fit and Maximize choices are the same idea as Scale to fit and Scale to fill here.
| Notevibes | PowerPoint Slide Size | Rebuild by hand | |
|---|---|---|---|
| Pictures kept in proportion | |||
| Layouts and masters resized | Manual | ||
| No PowerPoint needed | |||
| Narrate the deck with AI voices | |||
| Cloned voice | |||
| Video export | Soon | Export only | Export only |
Convert the deck above for free. When it should present itself, Noty narrates every slide and hands back the finished .pptx.
Fit or fill: picking the right option for a widescreen deck
A 16:9 slide is 13.33 inches wide, a 4:3 slide 10. At the same height, 3.33 inches of width have to go somewhere.
Scale to fit shrinks everything to three quarters of its size and centres it, leaving a band of background just under an inch deep above and below. Every element stays on the slide. Text keeps its point size, so a text box that is now narrower wraps its text onto more lines; check the busiest slides.
Scale to fill keeps everything at its current size and centres it, so about 1.67 inches on each side fall off the slide. It suits decks whose content sits in the middle with wide side margins.
Stretch squeezes positions and widths to three quarters and keeps the height. Text boxes and bars look fine squeezed; photos, logos and circles look narrow. Use it for text-heavy decks with few pictures.
The right shape, and now narrated
Noty writes the narration from your slides, voices every one of them in a natural voice or yours, and hands back a PowerPoint that plays itself.
Free to try · No credit card required
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Frequently Asked Questions
How do I change a PowerPoint from 16:9 to 4:3?
Drop the deck above, keep Scale to fit and press Convert. The slide size becomes 10 × 7.5 inches and every shape and picture is scaled to three quarters and centred, so nothing falls off the slide.
What size is a 4:3 slide?
10 × 7.5 inches (25.4 × 19.05 cm), PowerPoint’s Standard (4:3) size. The converted deck uses exactly that.
Why are there bands at the top and bottom?
Scale to fit shrinks the content to fit the narrower slide, which leaves spare height. The bands show the slide background. Choose Scale to fill to keep the content full height and trim the sides instead.
Does it change font sizes?
No. Shapes, pictures and text boxes are moved and resized, but text keeps its point size. If a text box got narrower, its text wraps onto more lines; adjust the few that need it in PowerPoint.
Will my images be distorted?
Not with Scale to fit or Scale to fill: both scale width and height by the same amount. Only Stretch changes proportions, and only if you choose it.
Is my deck uploaded?
No. The file is processed in your browser and never leaves your computer.
Can Notevibes narrate the deck too?
Yes. Tell Noty in the Notevibes Studio and it writes narration for every slide from the slide text or speaker notes, voices it in a natural AI voice or your own cloned voice, and hands back a narrated .pptx that auto-advances, plus the MP3.