Compare the words, not the look. Keep the signed-off original untouched, run the redesigned deck's text against it page by page, then read the numbers and footnotes by eye. A redesign is supposed to change how every slide looks, so a side-by-side glance proves nothing about the wording; a word-by-word comparison does. The free script below does that for any two .pptx files in under a minute. No tool, including BetterPPT, should be accepted on its “keep every word” promise alone.
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Freeze the approved original first
Keep one read-only copy of the signed-off deck and never run it through anything. Work on a duplicate. Note the slide count and the file name and date, so that at the end you can say exactly what was compared with what. If a partner, a lawyer or a client approved the wording, this is the version they approved.
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Compare the words, not the look
A redesign moves every box, so “does it look the same” is the wrong question. In desktop PowerPoint, Review → Compare can step through the differences between two versions, but it lists layout changes together with text changes, so on a redesigned deck it is slow. A words-only comparison is faster: extract the text of each slide from both files and see which words are missing and which are new.
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A free script that compares the words page by page
We use a short Python script (python-pptx) that reads every text box, table cell and grouped shape on each slide of two .pptx files and prints, for each page, either “same words” or the words that are missing and the words that were added. It ignores spacing, line breaks and bullet symbols, so a sentence split over two lines is not flagged; it does not ignore capital letters or punctuation. We ran it on a copy of a 30-slide deck with one number changed from 31 to 32: it flagged that one slide, and showed 31 as missing and 32 as added. Run it like this: python compare-pptx-text.py original.pptx redesigned.pptx.
Download the comparison script → - 04
What the script can and can't see
It reads real text, so it works on your original and on any file with genuine text boxes, such as BetterPPT's editable version. It cannot read words drawn into a picture: the HD image version, a photo of a table, a chart that is a picture, or a page that came back as a whole image. Those pages you check by eye, with the original open beside them. It also does not compare speaker notes or slide order, so check the slide count and the order yourself.
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Read the numbers and footnotes by eye
A script can say a digit changed; only you can say whether a footnote is still visible. For every slide with figures, check the value, the unit, the sign, the decimal places and any threshold such as “BMI >30” or “≥35 years”. Look for footnotes and source lines that a new layout has pushed off the page, table rows that were lost, and a legend or axis label that no longer matches. Check at presentation size, not zoomed out.
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What a real keep-every-word job looked like
We checked six slides of a real 30-slide clinical teaching deck redesigned in keep-every-word mode, by reading each slide against the original. On slides 2–6 the wording was unchanged; the only change was that two questions in one paragraph became two bullet points, and a generated image was added to one slide. The title slide gained a small “PHC” mark and a repeated subtitle that were not in the original. That is the kind of thing worth knowing: nothing was rewritten, but something was added. This was one deck, not a guarantee for yours.
What each content mode changes, with real examples → - 07
The text comparison report in BetterPPT's download menu
Once the editable version is ready, the download menu has a text comparison report (.csv): your original text against the text in the editable file, page by page, listing the words that are in one but not the other. Pages that come back as pictures are marked not checked. Read the notes at the end of the file. We make the editable version by erasing the text from the finished design and placing real text boxes in the same spots, so font, size, weight and position are approximated and some text, such as text on photos, decorative symbols and emoji, stays in the picture: visible, but not editable, and listed as a difference. Text editing matters most for business decks, so within those limits we put it first, and we keep improving it.
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Put it in writing, and ask for a sample first
Whoever does the redesign, a person or a tool, ask for word-for-word preservation rather than “same meaning”, and for a sample slide before the full deck. A written brief might read: “Visual redesign only. Keep all wording, numbers, dates, units and footnotes exactly as supplied. Flag anything that cannot fit instead of changing it.” With BetterPPT, choose keep every word on the setup page, and use the refundable $9.90 deposit to see up to six of your own slides before you pay the rest.
How AI redesign of an existing deck works → - 09
Who BetterPPT is for — and who it isn't
BetterPPT is an AI design agent that redesigns PowerPoint decks you've already written — every slide individually — and returns an editable .pptx. It's for decks where a lot is riding on it — a client proposal, a board readout, a bid, an investor meeting — where the content is final and the slides just need to look right. It isn't for a class assignment or a routine team update, where PowerPoint's own Designer or Canva's free plan is enough, and it isn't for decks whose charts or tables someone must keep updating by hand.
How AI redesign of an existing deck works →
Questions
How do I check that an AI redesign kept my exact wording?
Keep the signed-off original untouched, extract the text of each slide from both files and compare the words page by page, then read the numbers and footnotes by eye. A script such as the free one in this article does the comparison in under a minute for files with real text boxes. Pages drawn as pictures have to be checked by eye.
Does PowerPoint have a built-in way to compare two versions of a deck?
Desktop PowerPoint has Review → Compare, which merges a second version into the open file so you can step through the differences. On a redesigned deck it lists layout changes along with text changes, so it is slow; a words-only comparison is faster. Availability varies by version and platform.
Can I run the same check on BetterPPT's HD image version?
No. In the HD image version the text is drawn into the picture, so a text script has nothing to read; compare it with the original by eye. The editable .pptx has real text boxes and can be checked with the script, although pages that come back as whole images cannot. The download menu also has a text comparison report for the editable version.
Is “keep every word” a guarantee that nothing changes?
It is an instruction the redesign follows, not a guarantee, so check the result. In our own checks small things can differ even when no sentence is rewritten: a full stop, a decorative symbol, a small mark or a repeated subtitle added to a cover. That is why we suggest the comparison above for any deck whose wording is signed off.
What should I do if I find a changed word or number?
Fix it in the editable .pptx — the text is in real text boxes you can retype — or, once your deck is unlocked, redo that slide for free. Then run the comparison again. Don't present until the comparison is clean or every difference has been approved by whoever signed off the wording.
Bottom line
BetterPPT redesigns every slide individually and returns an editable .pptx; choose keep every word on the setup page and a refundable $9.90 deposit shows you up to six of your own slides before you pay the rest ($39 for up to 30 slides, $59 for 31–50).