Step 1
Pick a PowerPoint file
PPT Readability Checker
Not sure if your slides are easy to read? This tool checks text density, title length, and notes. Tells you what needs work.
Drag your file here, or browse
This checker reads slide text and speaker notes in your browser, then scores how dense the deck looks for a live presentation.
How to use Readability Check
Step 2
Browser reads text and notes, scores them
Step 3
See report, know what to fix
Features
Browser-only
no upload
Finds crowded pages
Gives you clear feedback
Supports .pptx
.pptm, .potx, and .ppsx
Complete Guide to PowerPoint Readability Checking
What this tool does
A readability checker is a specialized analysis tool that evaluates your PowerPoint slides for text density, visual clarity, and overall presentation quality. Unlike a simple spell-checker, it examines how much content appears on each slide, whether titles are concise enough, and whether speaker notes are overloaded. Research suggests slides with more than 40 words cause most viewers to disengage.
How to use it
- Select your fileSupports .pptx, .pptm, .potx, or .ppsx.
- Parsed locally in your browserAnalyzes each slide's text content, title length, bullet count, and notes volume.
- Review per-slide scoresSlides flagged as crowded appear highlighted.
- Revise based on the flagsSplit dense slides, move supporting details into speaker notes, or simplify your language.
Specs & limits
- Input
- .pptx / .pptm
.potx / .ppsx - Legacy .ppt
- Not supported
- Checks
- Text density / line count
Title length / notes coverage - Not checked
- Images / animations / embedded media
- Processing
- In your browser
- 200+ slides
- A few extra seconds
Files must be 75 MB or smaller. Presentations with more than 200 slides may take a few extra seconds to analyze. The tool checks text on visible slides, speaker notes, and basic structural elements. Its focus is purely on textual readability and information density per slide.
Tips for best results
- Follow the 6×6 ruleNo more than six lines per slide and six words per line.
- Put detailed points in speaker notesInstead of cramming everything onto the slide.
- Run it before important presentationsWhat looks fine on a 27-inch monitor may feel overwhelming on a projector.
- Keep titles under 10 wordsLonger titles tend to lose clarity.
- Restructure if consecutive slides get flaggedYou may be covering too much ground in too few slides.
Why Tosea.ai
Eyeballing it yourself
Stare long enough and you stop noticing density.
Uploading to online tools
A privacy risk for corporate or academic content.
Tosea.ai checker
In your browser, instant, with per-slide scores.
The analysis is instant with no server wait time. It is completely free with no usage limits, sign-ups, or watermarks. The readability checker fits naturally into a complete workflow where you create, refine, and polish presentations.
Related tools
FAQ
Readability Check FAQ
These answers explain what the tool does, what files it supports, and where the current limits are.
Full design review?
No. Just checks text density, titles, notes. Doesn't judge design beauty.
Uploaded to AI?
No. Runs in your browser, stays offline.
What if a slide's flagged as crowded?
Split it into two, or move detail to notes. Don't cram everything on one page.
Can I set custom readability thresholds?
The checker uses research-backed defaults — around 40 words per slide and concise titles. Custom thresholds aren't available yet, but the flagged results give you clear guidance on what to fix first.
Does it check formatting and design issues too?
It focuses on text density, title length, and speaker note overload. Visual design elements like color contrast and font choices are not currently analyzed, but text-based readability is the biggest factor in audience engagement.