Plan the reading order
Supply the audience, decision, source material and required coverage. Review the outline before generating. For a QBR, keep results, variance, risks and next decisions distinct instead of mixing them into a status collage.
Bring the document you already wrote — a Word file, a PDF, notes, or supported reference material — and build a structured deck you can review and edit. A document-to-presentation workflow should retain source context so you can check the numbers, tables, names, and quotations against the original. Extraction and source grounding support that review; they do not guarantee a faithful transcription or a factually complete deck.
Open an actual exported deck, then compare its outline, source constraints and slide choices with the job you need to finish.
A 10-slide briefing for an organisation’s leaders on NIST’s Cybersecurity Framework 2.0, built only from the framework document: the six Functions as a set with Govern at the centre, what Govern covers, questions leaders can ask their teams, how Current and Target Profiles show the gap to close, and the four Tiers. It describes no company, so it has no performance data.
A briefing for the executive leadership of an organisation of any kind; no company is named and none is described. Cover, in this order: what the framework is and why leaders should care; the six Functions, shown together as a set with Govern at the centre, with no numbering or order because the document says they are addressed concurrently; what the Govern Function covers, using the document's own list of Govern topics; questions leaders can ask their teams, in the document's own terms; what Current and Target Profiles are and how comparing them shows the gap to close; the four Tiers by name; and what to ask for next. Do not show any process as numbered steps. Say executives, leaders or the organisation wherever the document does: it mentions boards of directors only as readers, so do not give a board any role the document does not give it. Give at most one slide to how different kinds of organisation use the framework. Use only the supplied document. Where it gives no figure, date or finding, do not supply one: use no placeholders, no illustrative numbers and no made-up status data. Pictures should show technology, infrastructure or abstract subjects, not people. Workflow: Corporate executive. 10 slides requested. Document supplied as text (NIST, "The NIST Cybersecurity Framework (CSF) 2.0, NIST CSWP 29 (26 February 2024)", https://nvlpubs.nist.gov/nistpubs/CSWP/NIST.CSWP.29.pdf).
A separate reviewer agent read the deck’s 70 claims, slides and speaker notes, against the framework document: 62 are supported, 8 loosen or go a little beyond its wording, and none is missing from it or contradicts it. 19 of the 70 are advice the deck gives, and all 19 are supported. It is not a person’s review.
Supply the audience, decision, source material and required coverage. Review the outline before generating. For a QBR, keep results, variance, risks and next decisions distinct instead of mixing them into a status collage.
Edit structured slide fields, preview field alternatives or review a whole-slide rewrite. Ask Lumen can propose wider changes; inspect and select the changes before applying them to the saved deck.
Check charts, speaker notes, images and contrast in presentation view and the downloaded file. A new-period deck is a separate draft with changed values and sources to review.
Choose a creation mode and workflow profile, supply source material and review the planned coverage. Slide fields have layout-specific budgets. Field assistance offers alternatives with rationale and word counts; whole-slide refinement shows field-level changes. Ask Lumen can propose wider structural edits, which require a reviewed preview before application.
Paste spreadsheet rows, choose header handling and preview replacement chart data. Where offered, select Business metrics explicitly and inspect their source receipt. Review changes in values and sources before accepting a next-period draft. Theme controls cover brand colors, type, logo placement, background and contrast choices; a custom theme still needs visual review.
Inspect full-screen and audience views, speaker notes, next-slide preview, navigation and timer. Check PDF and PowerPoint separately. Supported elements can become native editable shapes or charts; complex visuals can use a flattened fallback. Speaker notes and per-slide handoff choices should be inspected in the actual file.
PowerPoint export is hybrid: supported content may remain editable while complex visuals can be flattened. Conversion between a responsive story and slides requires a preview; it is not lossless.
To turn a document into a presentation with AI, you upload the file, the tool reads its contents, and it writes a slide deck that follows your source. Most tools can do the first and last parts. The part that separates a deck you can hand to a client from one you have to re-check line by line is the middle: how faithfully the tool carries your actual figures, tables, dates, and names across into the slides.
The failure mode worth designing against is subtle. A model that “reads” your PDF and then writes slides from memory will round a number, swap a date, or smooth a caveat into a cleaner-sounding claim — and it looks polished while doing it. For an internal brainstorm that’s fine. For a board update, an investor deck, or anything a regulator might read, a single confidently-wrong figure is the whole problem.
So the useful way to evaluate any “document to slides” tool is one question: does it extract your text exactly, or does it re-describe it? The rest of this page explains both, then shows how Gixo Lumen is built around the first answer.
“Document” is broader than a Word file. Lumen accepts the formats people actually start from — up to five files at once.
.docx, .doc, plain .txt, and Markdown (.md). Reports, briefs, one-pagers, meeting notes — whatever you’ve already written.
Born-digital PDFs and scanned or image-only PDFs both work; pages that are really images are read with OCR before anything is written.
Excel workbooks are read cell-by-cell, so the actual values in your tables carry through rather than being eyeballed and retyped.
Bring a .pptx you want restructured or rebuilt on a cleaner theme, and start from its real content instead of a blank canvas.
Photos of a whiteboard, a screenshot, a scanned page — text is pulled out with OCR so a picture of words becomes editable words.
Drop in an .mp3, .wav, .m4a, or .mp4. The recording is transcribed first, then the transcript becomes the source for your slides.
Written in another language? The source is translated to English first, with numbers, formatting, and technical terms preserved — so the figures don’t shift in translation.
Six steps. The whole design goal is that the one creative step — writing the slides — is wrapped on both sides by deterministic steps that don’t improvise with your data.
Text is extracted by format-specific code: Word through its document format, spreadsheets cell-by-cell, and scanned pages or images through OCR. The extracted material then becomes source context for generation. Check source-critical figures, table headers, units, names, and quotations against the original; OCR and summarization can lose detail.
Use uploaded-only generation when the deck must stay within supplied material, or allow web context when broader research is appropriate. Lumen records generation-time source provenance; that record supports review but is not automatic claim verification.
Lumen checks the figures on your slides against the document you uploaded and rewrites one it cannot find there to the sourced value or without the number. Dates, names and quotes are not checked, so reviewers should still verify source-critical claims before presenting.
A one-page brief becomes a tight deck of roughly 8 slides; a long report expands toward 28. The length follows how much you actually gave it, so a short source doesn’t get padded out with filler to hit a number.
After the slides are written, automated checks enforce the right slide count, fit any overflowing content so nothing is cut off, swap in real licensed photography for named people, places, and products, and sanitize the markup — all without re-touching your data.
Edit slide content, swap themes, restructure sections, and preview the presentation inside Lumen. PowerPoint export is hybrid, with editable shapes where supported and fidelity-preserving images for complex slides.
Almost every AI presentation tool can produce a good-looking deck from a topic. The market has largely solved “make it look nice.” What is not solved — and what actually decides whether you can use the output — is fidelity: whether the $4.2M in your spreadsheet is still $4.2M on the slide, whether the Q3 date didn’t drift to Q2, whether the one cautious word in your legal summary survived.
Lumen extracts files before generation, records generation-time source provenance, and lets you choose uploaded-only or web-allowed context. Those controls make the review boundary visible, but they do not automatically reverify every generated claim. Compare figures, dates, quotes, and named entities with the original source before presenting.
The practical trade is between speed and review confidence. Use explicit source settings, inspect the provenance record, and keep human verification in the workflow before the deck leaves the building.
A comparison of the two ways to get from a finished document to a deck — the manual route most people still use, and an accuracy-first AI conversion.
| What you care about | Retyping into slides by hand | Lumen document-to-slides |
|---|---|---|
| Time to a first draft | An afternoon | Minutes |
| Numbers & tables from your source | Retyped — easy to fat-finger | Extracted into generation context; review still required |
| What happens to a missing fact | You notice it… or you don’t | Omitted or expressed neutrally by instruction; reviewer verifies |
| Outside context | Whatever you half-remember | Uploaded-only or web-allowed mode is chosen explicitly |
| Length | However far you get | Sized to the source (8–28 slides) |
| Scanned PDF or a recording | Transcribe it yourself first | OCR / transcription built in |
| Result | Editable, but slow | Editable deck, then refine |
The no-card 14-day trial adds AI generation and clean hybrid PPTX/PDF export.
Most people arriving here want one of three conversions. The mechanics are the same in each case; what differs is where the accuracy risk sits.
The cleanest of the three. A .docx already carries structure — headings, lists, tables — so the section order usually survives intact. Watch the tables: check that each figure on a slide still matches the cell it came from.
Depends entirely on whether the PDF is born-digital or a scan. A scanned page is an image, so it goes through OCR before anything is written, and OCR is where digits are most likely to drift. Spot-check numbers from scanned sources against the original.
The loosest input, so the structure is doing the most work. Meeting notes rarely arrive in the order a deck needs; review the outline before generating slides rather than after, when reordering costs more.
Whatever went in, what comes out is an editable Lumen deck rather than a flat image per page. From there the delivery choice is yours: hybrid PowerPoint export, where stable layouts become editable text and shapes and complex slides preserve fidelity as images, or PDF when the deck is only going to be read. The one habit worth keeping in either case is comparing the source-critical figures on the slides against the original file before you present.
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