Detailed SEO Extension vs Web Developer (2026): which should you pick?
As of Oct 23, 2026, Detailed SEO Extension and Web Developer share a 3.0 GPA, both are free, so the choice depends on which features you need.
Checked Oct 23, 2026 · graded Oct 23, 2026 by ToolGPA
They get the same grade on all five counts.
Price, platforms and features side by side. The table says where each price was read and when.
Detailed SEO Extension
Free Chrome and Firefox extension for one-click on-page SEO checks
Free
Web Developer
Free browser toolbar of page inspection and validation tools
Free
Which one is for you
Pick Detailed SEO Extension if
- Fits if you check titles, headings and schema on single pages and don't want to read the source
- Works for checking hreflang on a multi-language site, alternate by alternate
Look elsewhere if
- Skip it if you want search volumes, rankings or backlinks, as it has none of its own
- Too light for whole-site audits, since it inspects one page at a time
- Not for you if you browse in Safari or Edge, as only Chrome and Firefox are listed
- Watch out: the changelog's last entry is December 2024, though both stores show an update in 2026, and the interface is English only
Pick Web Developer if
- Fits if you check alt text, hidden elements and markup by hand
- Works for people who switch between Firefox, Edge and Chrome and want the same tools in each
Look elsewhere if
- Not for you if you want search, ranking or backlink data, as it has none
- Watch out: the latest release is 3.0.1 from June 2024, built in the developer's spare time with no release dates
- Skip it if you're on Opera, where the version is 0.2.2 from February 2017
- Tight if you're on Firefox, which lacks the disable features, Display Style Information and the context menu
How we grade them
| 3.0GPADetailed SEO ExtensionVery good | 3.0GPAWeb DeveloperVery good | |
|---|---|---|
| Value for money | AFree outright on Chrome and Firefox, and its page says there's no paid version and no upsells. Tags, headings, links, schema and hreflang all come at no cost. | AFree and open source in the Chrome, Edge, Firefox and Opera stores; the developer asks for optional donations. |
| Free plan and trial | AEvery feature is free, with no account, no plan to upgrade to and nothing held back. | AFree outright: every tool, on all four browsers, with nothing held back. |
| Features | CTitle, meta description, meta robots and X-Robots-Tag, headings, link and image exports, schema, hreflang with return-link checks and People Also Ask extraction. The gap the listing names: no keyword volumes, rankings or backlink data of its own. | CAlt and title attributes, broken images, element outlines, hidden elements, live CSS, cookies, forms, rulers, responsive previews and validator links. A large toolbox, but only part of it is SEO, and there's no search or ranking data. |
| Ease of use | BNo rating on record, but there's nothing to set up: install it, open a page, click the icon and the panel is there. | BNo rating on record, but nothing to set up: click the toolbar button and pick a tool from the menu. |
| Platforms and integrations | CChrome and Firefox extensions, so computers only, with no Safari or Edge version named. The Ahrefs, Semrush, Moz and Majestic links open those sites; no data is pulled in from them. | CChrome, Edge, Firefox and Opera on Windows, macOS and Linux, but computers only, with no integrations. |
| Best for | one-click page checks in Chrome or Firefox | a toolbar of page inspection tools |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Detailed SEO Extension and Web Developer. How we grade
Price against what you get
Detailed SEO Extension has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. Web Developer has no paid plan and scores 2.3.
On this chart the two sit in the same place: the same score for the same starting price. Of the other SEO browser extensions on the chart, none scores higher than Detailed SEO Extension for less, and none scores higher than Web Developer for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Web Developer is open source, according to its own site.
- Detailed SEO Extension also covers schema markup.
In commonFree planBrowser extensionSite audit
At a glance
| Detailed SEO Extension | Web Developer | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | The whole extension is free on Chrome and Firefox; its page says there are no upsells and no paid version. | The whole extension is free in the Chrome, Edge, Firefox and Opera add-on stores; the developer asks for optional donations. |
| Free trial | None listed | None listed |
| Browser extension | ||
| Made by | Detailed | Chris Pederick |
| Price read from | detailed.com | chrispederick.com |
| Checked | Oct 23, 2026 | Oct 23, 2026 |
Worth knowing
Detailed SEO Extension
- It inspects one page at a time and has no keyword volumes, rankings or backlink data of its own.
- It is listed for Chrome and Firefox only; the vendor names no Safari or Edge version.
- The changelog's latest entry is December 2024, though both stores show version 2.2.7 updated in 2026.
- The interface is in English only, according to the Chrome Web Store listing.
Web Developer
- The latest release, 3.0.1, dates from June 2024; the developer works on it in spare time and gives no release dates.
- The Opera version is much older, version 0.2.2 from February 2017.
- The Firefox version lacks the disable features, Display Style Information and the context menu, because Firefox removed the APIs.
- It is a general web developer toolbox, with no search or ranking data; its SEO uses are page-level checks.
Key features
Detailed SEO Extension
- Page overview
- Shows the title tag, meta description, meta robots and X-Robots-Tag header for the page you are on, with a quick link to its sitemap.xml.
- Headings view
- Lists every heading tag indented by level, with a button that copies them all to the clipboard.
- Links and images export
- Exports all links on a page and shows whether each is nofollow or sponsored; image URLs can be downloaded as a CSV file.
- Schema and hreflang
- Shows a page's structured data markup and all its hreflang alternates, with status codes and a check that each alternate links back.
- People Also Ask extraction
- An option on the Advanced tab extracts People Also Ask questions from Google results, including several levels deep.
- Right-click shortcuts
- Open the current page or site in Ahrefs, Moz, Majestic, Semrush, Similarweb or Archive.org, or run a site: search, from the context menu.
Web Developer
- Image and attribute checks
- Display alt attributes, image dimensions and title attributes on the page, replace images with their alt text, and find broken images.
- Outline and element information
- Outline elements with optional labels, show hidden elements and tag names, and inspect an element's details as you point at it.
- Validators
- Send the page to online HTML and accessibility validators from the toolbar; the help says these third-party features are the only ones that pass data on.
- Edit CSS and print styles
- Edit a page's CSS live in a panel, view print styles, and hide background or all images to see the page without them.
- Cookies, forms and JavaScript
- View, add and edit cookies, view form information, populate form fields, remove form validation and view a page's JavaScript.
- Rulers and responsive layouts
- A ruler, line guides and a color picker, plus responsive layout previews and resize sizes you configure yourself.
Plans
Detailed SEO Extension
Free$0
Every feature of the extension, free to install from the Chrome Web Store or Firefox Add-ons.
Web Developer
Free$0
Every tool in the extension, free on all four browsers, with optional donations to the developer.
Common questions
Which is cheaper, Detailed SEO Extension or Web Developer?
As of Oct 23, 2026, both Detailed SEO Extension and Web Developer are free to use.
Which has a free plan, Detailed SEO Extension or Web Developer?
As of Oct 23, 2026, both Detailed SEO Extension and Web Developer have a free plan.
More comparisons
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- Detailed SEO Extension vs SEO META in 1 CLICK
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- Detailed SEO Extension vs SEO Pro Extension
- Detailed SEO Extension vs SEO Minion
- Web Developer vs SEOquake
- Web Developer vs META SEO inspector
- Web Developer vs View Rendered Source
- Web Developer vs HeadingsMap
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.