Best for: Reshaping webpages you use often with plain-language AI customization in the browser
Sider Code is an AI browser feature that customizes webpages with natural-language instructions — adjust layout, hide distractions, add actions, extract information, and save changes that reapply automatically.
Sider Code is the webpage customization feature of Sider, the AI browser assistant. Describe a change to a page in your own words — make the header sticky, hide the cookie banner, switch the site to dark mode, summarize a long thread — and the tool reads the page structure, writes the change, and applies it live. No code, no CSS selectors, and no extra tools.
It sits in the Sider sidebar alongside Chat, Claw, and Create. Chat understands content, Claw automates multi-step browser tasks, and this feature is the customization arm: instead of living with every site exactly as the publisher built it, you reshape the pages you use to match how you actually read and work.
The company behind it is bootstrapped and based in Medford, Massachusetts, near Boston. Founded in 2023 by Joel Liu and Rick Fan, Sider reports more than ten million active users and over 100,000 five-star ratings, and the Chrome Web Store has named the extension Favorites of the Year 2025 and Editors' Pick 2026.
Natural-language page customization: layout, appearance, content, and actions
No coding or DOM knowledge required to use it
Part of the Sider AI assistant next to Chat, Claw, and Create
Bootstrapped, founded 2023, with millions of active users
What Sider Code Can Change on a Page
The feature is broad by design. Sider's official examples include adding dark mode to Google Docs, turning scattered X posts into a clean article with a table of contents, removing the Shorts shelf from YouTube, restructuring Hacker News threads into a clearer debate view, and reshaping long Wattpad chapters into a comfortable reading layout.
General categories of change the tool supports are layout and appearance (wider reading columns, cleaner spacing, restyled headers), distraction removal (ads, pop-ups, sidebars, sponsored content), content restructuring and summarization (condensing long articles or thousands of comments into a digestible overview), and adding page actions such as a summary button, translation, or form filling.
Every change can be saved as a script tied to that website. Saved scripts are listed in the My Scripts panel, where you can switch each one on or off at any time; while a script is on, it applies automatically whenever you revisit the matching page.
Dark mode, reading views, and layout adjustments
Hide pop-ups, ads, sidebars, and sponsored content
Summarize long content and restructure comment threads
Add page actions like summary, translation, or form-fill buttons
Extract prices, contact details, and key figures from a page
Save scripts per site and manage them from My Scripts
How Sider Code Works
Open the Code tab in the Sider sidebar on the page you want to change, then describe the outcome. The feature analyzes the current page, applies the change, and shows the updated result immediately, so you rarely need to guess what a prompt produced.
First-time setup is two steps per Sider's help center: enable the User Scripts permission for the extension (an Allow User Scripts toggle in the Chrome extension settings), and install Sider Operator from the Chrome Web Store, which helps the tool test and debug changes so customizations work more reliably.
If the result is close but not exact, keep the conversation going with follow-up prompts; attaching a screenshot helps the tool target the right spot, and complex changes can take a couple of rounds. After a script is generated, refresh the page to see the full effect.
Describe the change in plain English in the Sider sidebar
Tool analyzes the page and applies the change live
Setup requires User Scripts permission plus the optional Sider Operator
Follow-up prompts refine results; saved scripts persist per site
Sider Code vs Browser Extensions
Most extensions ship predefined functionality: install an ad blocker and you get fixed blocking rules; install a grammar checker and you get grammar checking. This feature inverts the model — instead of choosing from fixed capabilities, you describe the change you want and the tool generates it for that page.
That makes it more than element hiding: it can restructure content, add actions, and transform how a page works. It does not replace every extension, though. Dedicated tools still do specific jobs better, and it personalizes existing pages rather than building anything new. Expect overlap with a handful of single-purpose helpers rather than wholesale replacement.
Extensions offer predefined features; the tool generates changes from your words
Broader than blocking — it can restructure content and add actions
Not a full replacement for dedicated single-purpose extensions
Sider Code vs Sider Claw
Sider Claw and this feature are different products in the same sidebar. Claw is a browser agent: give it a task that spans sites — research, compare prices, fill forms, triage email — and it carries out the multi-step work across pages using your logged-in sessions, with every step visible.
The customization feature is about the look and behavior of a single page: how it is laid out, what it shows, and which actions it offers. Automating a workflow that crosses ten websites is a Claw task; reshaping one website so it works better for you is a customization task. Keep the two roles separate when evaluating the product.
Claw: automates multi-step tasks across websites in your browser
The customization feature: alters the layout, content, and actions of individual pages
They complement each other inside the Sider sidebar rather than overlap
Sider Code Pricing
Sider runs a freemium service. Free accounts get 30 basic credits per day for everyday chat, search, and assistant use, and the official pricing page states that all plans include all features, with higher plans adding more credits and a stronger cloud computer.
Sider's current paid lineup is Lite, Pro, and Max according to its published credit rules. Exact monthly and yearly prices are set on the official pricing page and at checkout; they were not independently verified for this review, so confirm the current rates before subscribing. Using the customization feature does not require a separate purchase beyond your Sider plan.
Who Should Use Sider Code
Anyone who lives in the browser and wishes the sites they visit worked better for them gets the most value. Researchers can strip cluttered reading views down to the content they cite, shoppers can surface prices and availability faster, and marketers can pull competitor data without tab after tab of manual copying.
It suits existing Sider users most of all, because it sits beside chat, Claw automation, and media creation in the same sidebar. It is less useful if you browse casually, if the sites you rely on already offer those features natively, or if your employer restricts browser extensions for security and policy reasons.
Researchers wanting focused reading views on cluttered pages
Shoppers comparing prices, stock, and product details across sites
Marketers extracting competitor and market data quickly
Sider sidebar power users who already use chat and Claw
Less relevant for casual browsing or policy-restricted environments
Limitations
The feature runs inside the Sider sidebar on a page in the current tab; it is not available in full-screen mode, per Sider's help center. It is designed to work on many websites, but not all — sites with special restrictions or complex layouts may need follow-up prompts to get the exact result.
Each saved script is tied to a page's structure, so if a site redesigns itself the customization may need refreshing. The feature personalizes existing pages rather than acting as a full website builder, and it depends on the extension being installed with the User Scripts permission enabled. As with any AI-generated change, review the result before relying on it.
Works only in the Sider sidebar — not in full-screen mode
Some sites have special restrictions or complex layouts
Scripts depend on page structure and may need refreshing after site changes
Personalizes existing sites; not a full website builder
Privacy and Security
This feature operates on the pages you visit: to apply a change it reads the page structure, runs a generated script inside that page, and stores your saved customizations against the site so they can reapply. Treat it with the same care you would any extension that has broad page access.
Install it only from the official Sider site or the Chrome Web Store, review the permissions you grant (including User Scripts), and use judgment about where you apply changes and what you type into prompts — especially on sensitive sites such as banking, work applications, or internal dashboards. Saved scripts can be switched on or off from My Scripts at any time, and Sider's privacy policy is the authority on how the company handles data.
Browser extension that reads page content and runs generated scripts
User Scripts permission is required to apply changes
Use official install sources and review permissions
Keep confidential information out of prompts on sensitive sites
Sider Code Alternatives
The closest directory alternatives are other AI browser helpers. Monica is an all-in-one assistant sidebar with chat, search, and page understanding. Eightify summarizes YouTube and web content inside Chrome. GPT for Sheets and Docs brings AI into Google Workspace, and Perplexity Labs is a playground for prompt experiments.
This product is differentiated by permanently modifying a website's layout and behavior from a plain-language request, which none of those tools attempt. For persistent per-site changes it is the focused choice; for a general chat-and-search sidebar, Monica or the base Sider assistant may be enough.
Monica AI
ChatbotsFreemium
Best for: All-in-one AI assistant in the browser
Monica AI is an all-in-one AI assistant for Chrome that combines GPT-5.5, Claude 4.7, and Gemini 3.1 in a sidebar for chat, search, writing, translation, and image generation.
Best for: Anyone doing repetitive spreadsheet and document work in Google Workspace who wants custom AI formulas, bulk generation, and translation at scale
GPT for Sheets and Docs is a Google Workspace add-on from GPT for Work that brings GPT, Claude, Gemini, and more models into your spreadsheets and documents with custom formulas, bulk generation, and translations.
The strengths are real: no-code, natural-language control over page layout and behavior, automatic re-application of saved scripts, and a single sidebar that also handles chat and automation. For knowledge workers it meaningfully reduces the friction of the daily web.
The trade-offs are the paid-plan requirement, the User Scripts permission and optional Sider Operator setup, sidebar-only operation, and the fact that it personalizes existing sites rather than building new ones. Within those boundaries it is a practical addition to the Sider assistant for anyone who wants the web to stop getting in the way.
Pros
Customizes pages with natural-language instructions — no code or DOM knowledge needed
Handles layout, dark mode, distraction removal, content restructuring, and page actions
Saves customizations per site and re-applies them automatically on repeat visits
Saved scripts are easy to switch on or off from the My Scripts panel
Combines page understanding with modification: summarize, extract, explain, and reshape in one flow
Part of the wider Sider assistant, with chat, Claw automation, and creation in the same sidebar
Cons
Requires the Sider extension and a paid plan — the free tier covers everyday chat and search
Needs the User Scripts permission plus the optional Sider Operator helper extension for reliable results
Runs only inside the Sider sidebar, not in full-screen mode or as a standalone tool
Some sites have complex layouts or special restrictions that require follow-up prompts
Personalizes existing pages rather than building or redesigning a site from scratch
Best For
Recommended use cases and scenarios where Sider Code shines.
It is Sider's webpage customization feature. Describe a change to a page in natural language and it applies the change for you — adjusting layout, hiding distractions, adding actions, or extracting information — and saves it so it re-applies on future visits.
Is Sider Code free?
Sider offers a free tier with 30 basic credits per day for everyday use, but the Code feature is part of Sider's paid plans. Sider states that all plans include all features, with higher plans adding more credits and a stronger cloud computer. Exact prices are on the official pricing page.
What changes can Sider Code make to a webpage?
It can adjust layout and appearance such as dark mode or a clearer reading view, remove pop-ups, ads, sidebars, and sponsored content, restructure long threads or articles for better navigation, add buttons and actions, and extract specific information from a page.
Does Sider Code work on every website?
Sider says it is designed to work on many websites, but some have special restrictions or complex layouts, so certain changes may need follow-up instructions. Review results on the live page before relying on them.
How do saved Sider Code customizations work?
Saved changes are stored in the My Scripts panel as scripts tied to a website. While a script is on, it applies automatically whenever you revisit that site; you can toggle scripts on or off at any time.
Is Sider Code safe to use?
It is a browser extension that reads page content and runs generated scripts to apply changes, so it needs the User Scripts permission. Install it from official sources, review the permissions, avoid confidential information in prompts, and use judgment on sensitive sites. Check Sider's privacy policy for data-handling details.
What is the difference between Sider Code and Sider Claw?
The customization feature changes a single page's look, content, and actions. Claw automates multi-step tasks across websites using your logged-in sessions. Automating a workflow that spans many tabs is a Claw task; reshaping one site to work better for you is a customization task.
Which browsers does Sider Code support?
The feature runs through the Sider browser extension, so the browsers it works in match those supported by Sider's extension, and it operates inside the Sider sidebar rather than in full-screen mode. Check Sider's official docs for the current list of supported browsers.
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