Google Docs has no built-in readability checker. No Flesch-Kincaid score, no grade level, no reading ease. Here is how to check your Google Doc's readability in 3 seconds — no add-on needed.
Check your Google Doc's readability — paste text, get scores.
Open Readability ScorerThat is it. No add-on to install, no permissions to grant, no waiting for a menu extension to load.
| Factor | Add-On | Copy → Online Tool |
|---|---|---|
| Setup time | ~3-5 min to find, install, authorize | ✓ None — paste and go |
| Permissions | ✗ Requires access to your documents | ✓ No permissions — text never leaves your browser |
| Privacy | ~Your text is processed by the add-on's servers | ✓ 100% local processing |
| Speed on long docs | ~Can be slow (30+ seconds) | ✓ Instant on any length |
| Scores available | Varies by add-on — often just Flesch | ✓ Flesch + Gunning Fog + SMOG |
| Cost | Some add-ons are paid after trial | ✓ Free forever |
| Works offline | ✗ Requires internet for add-on | ✓ Tool runs in browser (after load) |
| Feature | Google Docs | Microsoft Word | Online Checker |
|---|---|---|---|
| Built-in Flesch-Kincaid | ✗ No | ✓ Yes (after setup) | ✓ Yes |
| Built-in Gunning Fog | ✗ No | ✗ No | ✓ Yes |
| Built-in SMOG | ✗ No | ✗ No | ✓ Yes |
| Setup required | N/A | Enable setting + run spell check | None |
| Passive voice % | ✗ No | ✓ Yes | ✗ No |
| Works on partial text | N/A | ✓ Select then check | ✓ Paste selection |
| Mobile support | N/A | ✗ Desktop app only | ✓ Any device |
If you write in Google Docs, build readability checking into your publishing workflow:
Keep the readability scorer bookmarked. With Google Docs lacking native support, this becomes your go-to tab for every document.
Google Docs has no readability checker — this one is free and instant.
Check Readability Now