Sider Code Review — Customize Any Website With AI

ProductivityFreemium

Best for: Customizing any website with natural-language AI instructions in the browser

Sider Code is an AI browser feature that customizes any website with natural-language instructions — adjust layout, hide distractions, add actions, and extract information automatically.

0.0(0)

Founded 2023

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Sider Code sidebar customizing a website's layout with natural-language instructions

What Is Sider Code?

Sider Code is the website-customization feature of Sider, the AI browser assistant. It lets you take any web page and mold it to your needs by describing the change in natural language: make the header sticky, hide the cookie modal, clean up the layout, add a button that summarizes the page, or pull out a piece of data.

The result is a page that works the way you want, not the way the site designed it. Because the feature runs on top of the page in your browser, no development work is involved and the changes persist for your account. For heavy web users — researchers, shoppers, marketers, and knowledge workers — it removes the repetitive friction of websites that bury what you came for.

It is part of Sider, which packages chat with models like GPT, Claude, Gemini, and Grok, Claw browser automation, image and video creation, YouTube summaries, and PDF chat into one sidebar. The company is bootstrapped and based in Medford, Massachusetts, near Boston. Founded in 2023 by Joel Liu and Rick Fan, Sider reports six million-plus users and more than 100,000 five-star ratings, and the Chrome Web Store has featured the extension as an Editors' Pick.

Customizes any website with natural-language instructions
No coding required — changes apply live in your browser
Part of the all-in-one Sider AI assistant sidebar
Bootstrapped, founded 2023, with six million-plus users

Key Features

The core is a set of actions you trigger by typing a request. The most common ones are adjusting layout, hiding distracting elements, adding actions, and extracting information, and each can be saved so it runs automatically.

Layout adjustments cover things like fixing the header, cleaning up spacing, focusing the reading column, or collapsing sections you never use. Hiding elements removes modals, banners, sidebars, and other distractions, so articles and product pages stop fighting for your attention.

Custom actions take it further: you can add a button to a page that, when clicked, performs a task such as summarizing the content, translating it, or filling a form. Information extraction pulls specific data from a page, like prices, contact details, or key figures, instead of reading through everything manually.

Because every customization is tied to a specific site, the tool builds a personal layer on top of the web. Open the same page tomorrow and the changes are already applied, without asking the site for permission first.

Adjust layout, spacing, and reading flow of any page
Hide modals, banners, sidebars, and other distractions
Add custom actions and buttons that run tasks on the page
Extract prices, contact details, and key data from pages
Save customizations per site and apply them automatically
Run inside the Sider sidebar on supported browsers

How It Works

The feature works by pairing the Sider browser extension with the Sider app in your browser. On a supported site, you open the sidebar, describe what you want to change in plain English, and the tool analyzes the page structure to apply the change — no selectors, scripts, or developer tools.

It needs the User Scripts permission in the extension, which is what lets custom code run inside web pages safely. On Chrome, Edge, or Safari the extension carries the changes; the Sider apps provide the same assistant experience out of the browser.

Customizations you save are stored against the site and re-applied the next time you land on it. Between saved rules and one-off requests, you effectively get a tailored copy of the pages you use most, updated automatically.

Describe the change in plain English in the Sider sidebar
Tool analyzes the page structure and applies the change live
Requires the User Scripts permission in the extension
Saved customizations re-apply automatically on every visit

Sider Code Pricing

Sider runs a freemium model with a free plan of 30 daily credits, free forever, which covers everyday chat, search, and assistant tasks. This customization feature itself is a paid feature and requires one of the paid tiers — Lite, Plus, or Max.

Each paid tier expands the Sider feature set as well as access to the website-customization tools, and Sider sets the exact monthly price on its pricing page and at checkout. Teams evaluate it best by starting on the free plan to feel the sidebar workflow, then upgrading when they want to save persistent website customizations.

Who Should Use It

The feature suits anyone who lives in the browser and wishes the sites they visited worked better for them. Researchers can pin the pages they cite and strip out distractions, shoppers can surface prices and availability faster, and marketers can pull competitor data without tab after tab of manual copying.

Power users of AI assistants will feel most at home, because it sits beside chat, automation, and media creation in the same sidebar. If a favorite website is annoying to use — too many pop-ups, cluttered reading view, hard-to-find actions — that specific pain point is exactly what this feature removes.

Researchers who want focused reading views on cluttered pages
Shoppers comparing prices, stock, and product details across sites
Marketers pulling competitor and market data quickly
AI-assistant power users who already use the Sider sidebar

Sider Code Alternatives

The closest directory alternatives are other AI browser helpers. Monica is an all-in-one AI 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 the ability to permanently modify a website's layout and behavior, which none of those tools attempt. For persistent per-site customization, it is the focused choice; for a general chat-and-search sidebar, Monica or the base Sider assistant may be enough.

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Pros and Cons

The strengths are real: no-code, natural-language control over any website, automatic re-application of saved rules, 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 browser-permission overhead for some pages, and the fact that it personalizes existing sites rather than building new ones. Within those boundaries, it is a solid addition to the Sider assistant for anyone who wants the web to stop getting in the way.

Pros

Customizes any website using plain English — no code required
Hides distracting elements like modals, banners, and sidebars
Adds custom actions and buttons that trigger on the page
Remembers your customizations and applies them automatically
Extracts information from a page on demand
Part of the Sider AI assistant, so chat, search, and automation live in one sidebar

Cons

Requires a paid Sider plan — not available on the free tier
Runs inside the Sider sidebar, not as a standalone site builder
Needs browser extension permissions, including User Scripts
Best for individual page tweaks rather than full website redesigns

Best For

Recommended use cases and scenarios where Sider Code shines.

research content-creation marketing

Frequently Asked Questions

Common questions about Sider Code, answered.

What is Sider Code?

Sider Code is a browser feature of Sider that customizes any website using natural-language instructions. You describe a change — adjust layout, hide distractions, add actions, or extract information — and it applies the change to the page and can repeat it automatically on every visit.

Is Sider Code free?

No. Sider has a free plan with 30 daily credits, but this customization feature requires a paid Sider plan (Lite, Plus, or Max). Exact pricing is shown on Sider's pricing page.

What kind of changes can it make to a website?

It adjusts layout and spacing, hides modals, banners, and other distractions, adds custom action buttons that run tasks, and extracts specific information such as prices or contact details from a page.

Does it require coding?

No. Changes are described in plain English and the tool applies them by analyzing the page structure. It needs the User Scripts permission in your browser extension so custom code can run inside the page safely.

Which browsers does Sider Code support?

It runs through the Sider extension on Chrome, Edge, and Safari, with the Sider apps providing the same assistant experience outside the browser.

Will it remember my customizations?

Yes. Saved customizations are tied to a specific site and re-applied automatically the next time you visit, so your preferred layout and actions persist across sessions.

Who is Sider Code best for?

Researchers, shoppers, marketers, and AI-assistant power users who spend their day in the browser and want cluttered, poorly designed pages to work the way they prefer.

Reviews & Ratings

0.0

Based on 0 reviews

5★

-176%

4★

152%

3★

69%

2★

36%

1★

19%

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Priya Sharma

2025-11-05

Fast, intuitive, and the results speak for themselves. Easily worth the subscription.

James Okafor

2025-12-06

Great value for the price. The learning curve is small and the payoff is big.

Hannah Lee

2026-01-07

Reliable and polished. I only wish the advanced features were on lower tiers.

Pricing

Free plan with 30 daily credits, free forever. The customization feature is available on the paid Lite, Plus, and Max plans, which Sider prices on its pricing page and at checkout.

View pricing

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