Fact · Dictation in your apps
60megabytes
A January 2025 reply in the Chromium thread estimates each on-device speech recognition language pack in Chrome on Windows, Mac and Linux at about 60 MB.
Checked against its source on October 17, 2026
In the source's own words
“for Chrome on Windows/Mac/Linux, there's only one instance of each on-device speech recognition language pack and each language pack is ~60MB”
Intent to Ship: On-device Web Speech API (blink-dev), Chromium blink-dev mailing list, 2025, Reply on download sizes.
Open the original- What it measures
- The number is a design estimate in a public discussion before the feature shipped.
- What it does not show
- An estimate from a discussion, not a published download size. Check the current size on your own computer.