ChatTuner - ChatGPT Layout & Font Customizer

by Latent Builds · latentbuilds.com · Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 20 Oct 2026

Customize ChatGPT's width, font size, sidebar spacing, padding and layout with simple live controls.

Users

+5 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

+1 in 30 days

Store rank

#116K

#97K among extensions

Version

1.0.0

updated 21 Aug 2026

Users

monthly, 2 months

Latest, 20 Oct 2026: 42 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 months

Latest, 20 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About ChatTuner - ChatGPT Layout & Font Customizer

ChatTuner gives you live control over ChatGPT's layout, density, and typography. Click the toolbar icon to open a compact appearance panel directly over ChatGPT. The panel stays open while you use the page, so every adjustment is visible immediately. Tune the interface to suit the way you read: - Change sidebar width, item and menu vertical padding, font sizes, and section spacing. - Set a conversation max width from 600 px to 1600 px and keep the composer aligned with it. - Adjust body font size, line height, paragraph spacing, and spacing between turns. - Keep the composer aligned with the conversation width. - Start from Default, Compact, or Dense presets and fine-tune individual values. - Temporarily disable all changes without losing your saved settings. Settings are saved through Chrome's sync storage. ChatTuner has no account, analytics, advertising, external service, or cloud backend. It does not read, retain, or transmit conversation text. ChatTuner is an independent product by Latent Builds. It is not affiliated with or endorsed by OpenAI.