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alexchexes/chatgpt_ui_fix.user.js

Last active December 2, 2025 08:51
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ChatGPT web-interface width fix (and other UI improvements)
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chatgpt_ui_fix.user.js
// ==UserScript==
// @name ChatGPT CSS fixes
// @version 2025-11-30
// @description Adjusts the ChatGPT web UI for convenience: wider chat area, colored message bubbles, clearer code blocks, multi-line history items, and a few other tweaks for heavy ChatGPT use. ❤️ If you like this, consider buying me a coffee: ko-fi.com/alexchexes ❤️
// @updateURL https://gist.github.com/alexchexes/d2ff0b9137aa3ac9de8b0448138125ce/raw/chatgpt_ui_fix.user.js
// @downloadURL https://gist.github.com/alexchexes/d2ff0b9137aa3ac9de8b0448138125ce/raw/chatgpt_ui_fix.user.js
// @author alexchexes
// @website https://ko-fi.com/alexchexes
// @namespace http://tampermonkey.net/
// @match https://chat.openai.com/*
// @match https://chatgpt.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=openai.com
// @grant GM_addStyle
// ==/UserScript==
/* global GM_addStyle */
console.info("%c'ChatGPT CSS fixes' userscript is connected", 'color: #8ff; background: #000');
(function () {
const SELECTORS = {
PROMPT_INPUT: `div#prompt-textarea.ProseMirror`,
SIDEBAR: `#stage-slideover-sidebar[style*="sidebar-width"]`,
};
// Prevent chatGPT bug that breaks interface when PageUp/PgDown key is pressed when textarea is focused and not empty
document.addEventListener('keydown', function (e) {
if (
(e.key === 'PageUp' || e.key === 'PageDown') &&
e.target.matches(SELECTORS.PROMPT_INPUT)
) {
e.preventDefault();
}
});
const accentForDark = `#f39c12`;
const defaultSettings = {
/* CHAT ELEMENTS */
chatWidth: {
enabled: true,
maxWidth: `90%`,
},
userInputWidth: {
enabled: true,
maxWidth: `70%`,
},
projectScreenWidth: {
enabled: true,
maxWidth: `70vw`,
},
textAreaHeight: {
enabled: true,
maxHeight: '50dvh',
},
codeBlockFont: {
enabled: true,
fontFamily: `Consolas`,
},
codeBlockBackground: {
enabled: true,
bgColorDark: `#181818`,
// bgColorLight: `#252525`,
},
codeBlockLineBreaks: { enabled: true },
inlineCodeColor: { enabled: true },
codeBlocksInUserMessages: { enabled: true },
userMessageVisibility: {
enabled: true,
backgroundDark: `linear-gradient(135deg, #34437a, #2b2f54)`,
backgroundLight: `#c1d6f6`,
},
botAvatarVisibility: { enabled: true },
botThinkingHeadings: {
enabled: true,
colorDark: `#66ceff`,
colorLight: `#0047c2`,
},
responseVariantsVisibility: { enabled: true },
tableMargins: { enabled: true },
/* TOP BAR */
topBarTransparency: { enabled: true },
projectChatNameVisibility: { enabled: true },
gptVersionVisibility: {
enabled: true,
color: accentForDark,
},
/* SIDEBAR */
sidebarWidth: {
enabled: true,
sidebarWidth: `330px`,
},
sidebarHeadingsVisibility: {
enabled: true,
color: accentForDark,
},
multilineHistoryTitles: {
enabled: true,
},
/* MISC (chatGPT) */
// modal in Personalisation > Memory height
saneModalHeight: {
enabled: true,
},
projectChatsSubtitles: {
enabled: true,
},
projectChatsListWidth: {
enabled: true,
},
projectChatsPaddings: {
enabled: true,
},
/* CODEX */
inTaskTextAreaSize: {
enabled: true,
},
};
const constructFeaturesCss = () => {
const cssByFeature = {
/*------------------------------*
* CHAT ELEMENTS *
*-------------------------------*/
/* Main chat section width */
chatWidth: `
@container (min-width: 768px) {
article > div > .\\[--thread-content-max-width\\:40rem\\] {
max-width: ${defaultSettings.chatWidth.maxWidth} !important;
}
/* Deep Research containers */
article > div > .\\[--thread-content-max-width\\:40rem\\] .p-4.sm\\:p-8,
article > div > .\\[--thread-content-max-width\\:40rem\\] .p-4.sm\\:p-8 > .\\[--thread-content-max-width\\:40rem\\] {
max-width: 100%;
}
}
`,
userInputWidth: `
@container (min-width: 768px) {
#thread-bottom-container .\\[--thread-content-max-width\\:40rem\\] {
max-width: ${defaultSettings.userInputWidth.maxWidth} !important;
}
}
`,
projectScreenWidth: `
@container (min-width: 850px) {
.px-\\(--thread-content-margin\\).h-full > .mx-auto.flex.max-w-\\(--thread-content-max-width\\).flex-1.text-base.flex-col {
max-width: ${defaultSettings.projectScreenWidth.maxWidth} !important;
}
}
`,
textAreaHeight: `
@media (min-width: 768px) {
.max-h-\\[25dvh\\].overflow-auto {
max-height: ${defaultSettings.textAreaHeight.maxHeight};
}
}
`,
/* Code blocks font */
codeBlockFont: `
code, pre {
font-family: ${defaultSettings.codeBlockFont.fontFamily}, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace !important;
}
`,
/* Code blocks background color */
codeBlockBackground: `
/* DARK */
html.dark pre > div.rounded-md {
background-color: ${defaultSettings.codeBlockBackground.bgColorDark};
}
`,
/* Break lines in code blocks */
codeBlockLineBreaks: `
code[class][class][class], code[class][class][class].whitespace-pre\\!, code.whitespace-pre\\!:not([data-highlighted="true"]) > span:only-child {
display: inline-block;
white-space: pre-wrap !important;
overflow-wrap: anywhere !important;
}
`,
inlineCodeColor: `
html.dark [data-message-author-role="user"] div > code,
html.dark .prose code:not(:where(pre code)) {
color: #eab38a;
background: #272727;
border: 1px solid rgba(94, 93, 89, 0.25);
}
html.dark .prose a>code:not(:where(pre code)) {
color: inherit;
}
`,
/* Code blocks inside user messages */
codeBlocksInUserMessages: `
/* inline code */
[data-message-author-role="user"] div > code {
font-size: 14px;
background: #00000030 !important;
border-radius: .25rem;
padding: 1px 5px;
border: 1px solid #00000026 !important;
}
/* multiline code blocks */
[data-message-author-role="user"] pre {
background: #00000030;
padding: 2px 7px;
border-radius: 11px;
}
/* multiline code blocks FONT SIZE */
[data-message-author-role="user"] pre > code {
font-size: 14px;
}
`,
/* Make our messages more visible. */
userMessageVisibility: `
/* DARK */
html.dark [data-message-author-role="user"].text-message > .w-full > .user-message-bubble-color {
background: ${defaultSettings.userMessageVisibility.backgroundDark};
}
/* LIGHT */
html.light [data-message-author-role="user"].text-message > .w-full > .user-message-bubble-color {
background: ${defaultSettings.userMessageVisibility.backgroundLight};
}
`,
/* Make bot message start more visible by increasing visibility of its avatar. */
botAvatarVisibility: `
/* DARK */
html.dark .gizmo-bot-avatar > div {
background: linear-gradient(45deg, #3F51B5, #00BCD4);
}
html.dark .gizmo-bot-avatar {
outline: none;
}
/* LIGHT */
html.light .gizmo-bot-avatar > div {
background: #252525;
color: #ffffff;
}
`,
botThinkingHeadings: `
html.dark article p strong.font-semibold.text-token-text-primary {
color: ${defaultSettings.botThinkingHeadings.colorDark};
}
html.light article p strong.font-semibold.text-token-text-primary {
color: ${defaultSettings.botThinkingHeadings.colorLight};
}
`,
responseVariantsVisibility: `
article div.has-data-\\[state\\=open\\]\\:opacity-100:has(button[aria-label="Previous response"]) {
opacity: 1 !important;
}
button[aria-label="Previous response"] + div.tabular-nums {
background: #f39c12;
border-radius: 6px;
color: #181818;
padding: 0 5px;
}
`,
tableMargins: `
article [class*="_tableContainer"] {
width: 100%;
max-width: 100%;
margin: 0;
scrollbar-width: auto;
pointer-events: auto;
}
article [class*="_tableContainer"] > [class*="_tableWrapper"] {
margin: 0;
}
`,
/*----------------*
* TOP BAR *
*-----------------*/
/* Make top bar transparent as it consumes vertical space for no reason */
topBarTransparency: `
#page-header {
background: transparent !important;
position: absolute;
width: 100%;
box-shadow: none;
}
.thread-xl\\:pt-header-height.pb-25 {
padding-top: var(--header-height);
}
/* Background for top bar element that shows the current GPT version */
/* DARK */
html.dark #page-header button:not(:hover) {
background-color: #2121218a;
border-radius: 8px;
backdrop-filter: blur(2px);
}
/* LIGHT */
html.light #page-header button:not(:hover) {
background-color: #ffffffb0;
border-radius: 8px;
backdrop-filter: blur(2px);
}
`,
/* Project chat name visibility */
projectChatNameVisibility: `
/* DARK */
html.dark main .sticky.top-0 .flex.items-center.gap-0.overflow-hidden button > div.truncate {
color: #e9cc9e;
}
/* LIGHT */
html.light main .sticky.top-0 .flex.items-center.gap-0.overflow-hidden button > div.truncate {
color: #000;
}
`,
/* GPT version visibility */
gptVersionVisibility: `
/* DARK */
html.dark .sticky.top-0 [type="button"] > div > span.text-token-text-tertiary {
color: ${defaultSettings.gptVersionVisibility.color};
}
/* LIGHT */
html.light .sticky.top-0 [type="button"] > div > span.text-token-text-tertiary {
color: #000;
}
`,
/*------------------*
* SIDEBAR *
*-------------------*/
/* Sidebar width */
sidebarWidth: `
@media not all and (max-width: 768px) {
${SELECTORS.SIDEBAR},
${SELECTORS.SIDEBAR} .w-\\[var\\(--sidebar-width\\)\\] {
width: ${defaultSettings.sidebarWidth.sidebarWidth} !important;
}
}
`,
/* History periods headings (like "Today", "Yesterday") visibility */
sidebarHeadingsVisibility: `
/* DARK */
html.dark ${SELECTORS.SIDEBAR} h3 {
color: ${defaultSettings.sidebarHeadingsVisibility.color};
}
/* LIGHT */
html.light ${SELECTORS.SIDEBAR} h3 {
font-weight: 700;
}
`,
multilineHistoryTitles: `
${SELECTORS.SIDEBAR} #history a[draggable="true"] .truncate {
overflow: visible;
white-space: normal;
}
${SELECTORS.SIDEBAR} #history a[draggable="true"] > div.text-token-text-tertiary.flex.items-center.self-stretch {
position: absolute;
right: 5px;
top: 50%;
translate: 0 -50%;
}
`,
/* MISC */
saneModalHeight: `
div[role="dialog"] .h-\\[24rem\\] {
height: 75vh;
}
`,
projectChatsSubtitles: `
html.dark li.hover\\:bg-token-bg-tertiary a .text-token-text-secondary.truncate.text-sm {
color: #999999;
}
`,
projectChatsListWidth: `
.text-base.overflow-y-auto.my-auto.mx-auto:has(li.hover\\:bg-token-bg-tertiary) {
width: 100%;
}
`,
projectChatsPaddings: `
li.hover\\:bg-token-bg-tertiary .group.relative.flex.flex-col.gap-1.p-4 {
padding-block: 8px;
}
`,
inTaskTextAreaSize: `
._prosemirror-parent_kfgfu_2 {
max-height: 50vh !important;
}
`,
};
// Adding a unique string to find our <style> element later
const cssIdComment = `/* USERSCRIPT_FEATURES_STYLES */`;
const cssBase = `
#stage-sidebar-tiny-bar {
cursor: auto;
}
`;
let cssStyles = cssIdComment + cssBase;
// Combine feature CSS blocks into a single CSS string if enabled in the current settings
for (let key in cssByFeature) {
if (Object.prototype.hasOwnProperty.call(cssByFeature, key)) {
if (typeof defaultSettings[key] !== 'undefined' && defaultSettings[key].enabled) {
cssStyles += cssByFeature[key] + '\n';
}
}
}
cssStyles = cssStyles.replaceAll('\t', ' ');
return cssStyles;
};
const renderFeaturesStyles = () => {
const css = constructFeaturesCss();
GM_addStyle(css);
};
/* Stub for the later update */
// const removeFeaturesStyles = () => {
// let style_elements = document.querySelectorAll('style');
// style_elements.forEach(style_el => {
// if (style_el.innerHTML.includes('USERSCRIPT_FEATURES_STYLES')) {
// style_el.remove();
// }
// });
// };
renderFeaturesStyles();
})();
@DediqaTech
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DediqaTech commented Dec 2, 2025 •
edited
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Great work, absolutely love the wide view of chats, that helps so much! I really don't understand why their UI/UX is so damn horrible.
I've been making some changes to the sticky move-to-bottom button which I found so annoying being right in the middle overlapping the chat and moved it to the right hand side, which looks so much cleaner now.
Maybe you could add that to the script as well:

        div:has(article) > div:last-child > button {
            right: 40px !important;
            left: auto !important;
            bottom: 40px !important;
        }

Also it would be kinda nice if the given settings could be edited in the frontend (for the people who just added your github version with auto updates instead of forking). I am not really a fan of the light blue for example.

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