Smooth GPT
ChatGPT that actually keeps up with you.
Fix lag, slow scrolling, and typing delays in long ChatGPT conversations. Four performance strategies applied automatically — no configuration needed.
60–90%
DOM node reduction in code-heavy chats
300→80
Effective message load (with API trim)
0
Setup steps. It just works.
The problem
ChatGPT slows to a crawl after 60+ messages
ChatGPT renders every message into the DOM at once. In a long conversation, that means thousands of React nodes, hundreds of CodeMirror instances for code blocks, and a browser that struggles to keep up with your typing.
Scrolling stutters. Typing lags. The page takes seconds to load. It gets worse the longer the conversation gets.
Smooth GPT solves this with four complementary strategies, each targeting a different bottleneck. Applied together, the effect is dramatic.
How it works
Four strategies, one extension
API Trim
Biggest impactIntercepts the conversation payload before React renders it. Old messages are stripped at the network level — they never enter the DOM. A 300-message conversation loads as fast as an 80-message one.
Content Visibility
AutomaticApplies content-visibility: auto to every message so the browser skips layout and paint for off-screen content. Activates automatically on conversations with 60+ visible messages.
Code Block Deflation
DOM saverChatGPT uses CodeMirror for code blocks — each one creates hundreds of DOM nodes. Smooth GPT replaces off-screen blocks with plain text and restores them on scroll. Cuts DOM node count by 60–90% in code-heavy chats.
Aggressive Pruning
OptionalDetaches message nodes far from the viewport and replaces them with height-preserving placeholders. Re-attaches on scroll. Best for 100+ message conversations where nothing else is enough.
Install
Works on any Chromium browser
Chrome, Edge, Brave, Arc — any browser running the Chromium engine. Works on chatgpt.com and chat.openai.com.
Built by
Kozilabs
Smooth GPT is built and maintained by Kozilabs — a boutique software engineering studio based in Kaunas, Lithuania. We build custom software, Chrome extensions, and automation systems.