Redact PowerPoint and Google Slides presentations
The names and data on the slides become codes, without redacting or hiding anything by hand.
Your document is not passed to any AI: it does not leave your computer and is not uploaded or stored. The name detector runs inside your browser. You can check it: after the first document, disconnect from the internet and it keeps working.
Options
Document language:
Citations of published works (“(Smith, 2019)” and the reference list) stay as they are. Turn it off for a blind review.
An italic paragraph, in the document’s language, that explains to the AI what the codes in brackets are and asks it not to try to guess the data.
Do you already have a HILO lookup table (from a dataset or another document)? Load it and the same people and data keep their codes.
First time using the anonymizer? To process your document without it leaving your phone, HILO has to download, only once, the dictionaries and files it needs (about 140 MB). We recommend using Wi-Fi. On a phone, the process may take longer than on a computer.
Do not close this tab.
People
ID numbers, phone numbers, and emails
Uncheck what you do not want to replace. The names you see here do not leave your computer.
To review
If you do not review them, they are covered anyway. Review them so you do not cover words that are not data.
Before downloading, look at this
These words were left in the anonymized document and could be people or data. Replace the ones that are.
An anonymized presentation in three steps
1. Load it
Drag in the .pptx. If it is in Google Slides, download it as PowerPoint; save the old .ppt as .pptx.
2. Review
Review what it found, slide by slide and in the speaker notes.
3. Use it with AI
Download the same presentation, with the design intact and the data as codes.
What you see and what you do not
A presentation keeps data outside the slides: speaker notes, comments with their authors, the master, and the spreadsheet behind each chart (with all the numbers and labels, even if the chart shows less). HILO replaces the data in all of that, removes the comments and the chart’s hidden spreadsheet, and empties the properties.
Is it in Google Slides? Download it with File → Download → Microsoft PowerPoint (.pptx). The old .ppt has to be saved as .pptx first.
What a presentation keeps without showing
HILO also replaces the data in:
- speaker notes, which nobody sees on screen;
- charts, and removes the hidden Excel spreadsheet inside them;
- the slide master, where the author’s name sometimes stays;
- comments, which are removed along with their authors.
An embedded object (a file inside the slide) is removed entirely, with a warning.
What you can ask the AI with an anonymized presentation
Slides and notes arrive in order:
- write a script to present it;
- summarize it in one paragraph for an email;
- suggest clearer titles;
- turn it into a written report.
Documents worth anonymizing before using AI
Plans
Start free. When you want more, subscribe or buy hilos on their own.
- Keyword search, coding, and annotating, with no limit
- Unlimited downloads of the edited document
- Error diagnostics and tools for datasets
- Topic and code summaries
- Kappa calculator
- AI features (concept maps, assisted coding, checklist, logic model, variable operationalization), with your hilos
- Anonymize documents: 1 without an account, 5 per week with your account (ES · EN · PT)
- 325 hilos per week for AI features (renewed every Monday at 00:00 UTC)
- Change tracking (redline)
- Change history and traceability
- Anonymize documents: 50 per week (ES · EN · PT)
Payment is processed by Paddle. HILO doesn't see or store your card details.
The week renews on Monday. Each anonymized document you download counts once per file.
Yes, with the same codes as the slides.
The chart keeps the codes in its labels, and the hidden Excel spreadsheet inside it, which often has more data than what is shown, is removed.
Yes: download the presentation as PowerPoint (.pptx) and load it here.
Not yet: save it as .pptx from LibreOffice and load it.
Yes: only the data is changed to codes.