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The Web Developer Insider’s Guide

Everything we know about Web Developer in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.

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ToolGPAOctober 2026

Web Developer

The Insider’s Guide

Free browser toolbar of page inspection and validation tools

Every plan, grade, refund rule and rival among SEO browser extensions, read from Web Developer’s own pages.

Made by Chris Pederick · checked Oct 23, 2026 · toolgpa.com

3.0GPA

Contents

  1. 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
  2. 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
  3. 03What it doesIts main features, where it runs, what it works with and who makes it
  4. 04Where it standsIts grades against its category, and whether to keep it or make your own
  5. 05The alternativesThe tools it is most often weighed against, side by side
  6. 06Quick answersThe questions people ask about it, each answered in a line or two
  7. 07About ToolGPAWho made this guide, what else is on the site, and how to cite it

ToolGPA put this guide together from Web Developer’s own pages, its app-store listings and our grades. Every fact in it is on Web Developer’s page too, where it is kept up to date. Checked Oct 23, 2026.

Part 01 · Overview

Welcome

What it is, who it suits, its grades and the ten things to know first

3.0

GPA, above 17 of the 34 other SEO browser extensions we grade

Web Developer is a free, open-source browser extension by Chris Pederick that adds a toolbar button full of tools for inspecting and changing the page you are viewing. It can outline elements, show alt and title attributes, find broken images, edit CSS live, view cookies and forms, and send a page to HTML and accessibility validators. It is available for Chrome, Edge, Firefox and Opera.

To get you started, here are 7 things to know about Web Developer, taken from its own pages and our grades.

No rating on record, but nothing to set up: click the toolbar button and pick a tool from the menu.
From our grade for ease of use
  1. 1

    Best for a toolbar of page inspection tools

    Web Developer adds a toolbar of page tools, alt and title attributes, broken images, element outlines, live CSS editing, cookies, forms and links to HTML and accessibility validators, free on Chrome, Edge, Firefox and Opera.

  2. 2

    It is free

    Web Developer has no paid plan at all. The whole extension is free in the Chrome, Edge, Firefox and Opera add-on stores; the developer asks for optional donations.

  3. 3

    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.

  4. 4

    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.

  5. 5

    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.

  6. 6

    A 3.0 GPA, above 17 of 34

    That is against the other SEO browser extensions we grade, on value, the free plan, features, ease of use and platforms.

  7. 7

    Keep it

    Web Developer is free, so making your own would save you nothing.

Web Developer at a glance

Pricing
Free
Free plan
Yes
Free trial
None stated
Runs on
Browser extension
Made by
Chris Pederick
Category
SEO Browser Extensions
Our grade
3.0 GPA, very good

The report card

Best for a toolbar of page inspection tools

Web Developer adds a toolbar of page tools, alt and title attributes, broken images, element outlines, live CSS editing, cookies, forms and links to HTML and accessibility validators, free on Chrome, Edge, Firefox and Opera. It's a general developer toolbox with no search or ranking data, the Opera version dates from 2017, and the latest release, 3.0.1, is from June 2024.

ToolGPA report cardWeb DeveloperGraded Oct 23, 2026
SubjectGradeComment
Value for moneyAFree and open source in the Chrome, Edge, Firefox and Opera stores; the developer asks for optional donations.
Free plan and trialAFree outright: every tool, on all four browsers, with nothing held back.
FeaturesCAlt 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 useBNo rating on record, but nothing to set up: click the toolbar button and pick a tool from the menu.
Platforms and integrationsCChrome, Edge, Firefox and Opera on Windows, macOS and Linux, but computers only, with no integrations.
Grade point averageVery good, out of 4.03.0

An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.

Who Web Developer is for

  • 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

Who it is not for

  • 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

Good to know

Good for

  • Checking a page's alt text, hidden elements and markup by hand
  • Developers and SEOs who use Firefox, Edge or Chrome interchangeably
  • Quick front-end checks without opening the browser's developer tools

Worth knowing

  • 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.

Part 02 · Pricing

What it costs

Every plan, the free plan, ways to pay less and how prices have moved

Free

No paid plan at all

Web Developer is free to use.

Free and open source in the Chrome, Edge, Firefox and Opera stores; the developer asks for optional donations.
From our grade for value for money

  • Free

    $0

    Every tool in the extension, free on all four browsers, with optional donations to the developer.

The free plan

The whole extension is free in the Chrome, Edge, Firefox and Opera add-on stores; the developer asks for optional donations.

Read from chrispederick.com on Oct 23, 2026.

Part 03 · Features

What it does

Its main features, where it runs, what it works with and who makes it

1

Place it runs: Browser extension

Free browser toolbar of page inspection and validation tools. Here is what it does, as its own site describes it, and what it covers: open source, site audit.

A large toolbox, but only part of it is SEO, and there's no search or ranking data.
From our grade for features
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.

Where it runs

  • Browser extension

What it works with

Its own pages name no integrations.

Web Developer is made by Chris Pederick.

Part 04 · Standing

Where it stands

Its grades against its category, and whether to keep it or make your own

17/34

Other SEO browser extensions it is graded above

Web Developer's GPA of 3.0 is higher than 17 of the 34 other SEO browser extensions we grade, and level with 16.

It stands best on free plan and trial (A, above 5 of 34) and worst on platforms and integrations (C, above 0).

Web Developer has no paid plan.

On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.

Each grade against the category

Every bar is all 35 SEO browser extensions we grade, cut by the letter each got. Web Developer’s own letter is outlined.

  • AValue for moneyAbove 4 of 34
  • AFree plan and trialAbove 5 of 34
  • CFeaturesAbove 14 of 34
  • BEase of useAbove 3 of 34
  • CPlatforms and integrationsAbove 0 of 34

Price against what you get

Each dot is one of 34 SEO browser extensions. Further left costs less; higher up scores better on features, ease of use and platforms. Web Developer is the marked dot.

C2.0B3.0A4.0Free$5$10$20$50More for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessWeb DeveloperSEOquakeSEO Review Tools for…Sprout SEOSerpWorx

What paid plans start at, a month (each step along is roughly double) →

Keep it, or make your own?

Whether this is something you could build for yourself with an AI app builder, and what you would give up.

Keep it

Web Developer is free, so making your own would save you nothing.

What you could not

  • A crawler that checks every page of a site.

What this rests on. Web Developer’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.

Part 05 · Alternatives

The alternatives

The tools it is most often weighed against, side by side

SEOquake, Detailed SEO Extension, META SEO inspector, View Rendered Source and HeadingsMap

The 5 tools Web Developer is most often weighed against, with where each one differs from it.

Part 06 · Questions

Quick answers

The questions people ask about it, each answered in a line or two

10

Questions, each answered in a line or two

The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.

Is Web Developer free?

Yes. Web Developer is free to use.

How much does Web Developer cost?

Web Developer lists one plan. Free: $0.

Does Web Developer have an Android app?

No Android app was listed when its pages were read on Oct 23, 2026. Web Developer is listed for no platform we could confirm.

Does Web Developer have an iPhone app?

No iPhone app was listed when its pages were read on Oct 23, 2026. Web Developer is listed for no platform we could confirm.

Is Web Developer open source?

Yes. Web Developer is open source, according to its own site.

Who makes Web Developer?

Web Developer is made by Chris Pederick.

What are the alternatives to Web Developer?

The closest alternatives to Web Developer in our directory are SEOquake, Detailed SEO Extension, META SEO inspector, View Rendered Source and HeadingsMap.

How does Web Developer compare with other SEO browser extensions?

Web Developer's GPA of 3.0 is higher than 17 of the 34 other SEO browser extensions we grade, and level with 16.

Is Web Developer good value for money?

ToolGPA grades Web Developer A for value for money. Web Developer has no paid plan.

Could I make my own version of Web Developer?

Web Developer is free, so making your own would save you nothing. What you could not make: A crawler that checks every page of a site.

Where this guide comes from

The prices, plans, platforms and features were read from Web Developer’s own pages on Oct 23, 2026, and the grades were given on Oct 23, 2026. Graded from this listing, whose facts were read from the developer's own pages and its Chrome and Firefox store listings on 23 October 2026. Not based on using the product, and shorter than our full reviews.

Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Chris Pederick. Prices change, so check chrispederick.com before you buy.

Part 07 · About

About ToolGPA

Who made this guide, what else is on the site, and how to cite it

3,189

Tools graded, in 94 categories

ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.

Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.

  • 3,189

    tools graded

  • 94

    categories

  • 426

    price changes on record

  • 579

    apps priced in 12 countries

What else is on toolgpa.com

Scan for the live page

Prices and grades as they are today

Quoting this guide?

Please name ToolGPA and link to the live page, so readers can check the figures for themselves:

ToolGPA, "Web Developer: The Insider's Guide", checked Oct 23, 2026. https://toolgpa.com/tools/web-developer

Know someone choosing between SEO browser extensions?

Send them this guide: toolgpa.com/tools/web-developer/guide

ToolGPA elsewhere: youtube.com/@toolgpa

See our other guides

The best-graded SEO browser extensions after Web Developer, each with an Insider's Guide of its own.

ToolGPA

Choosing software? Every tool graded, every price dated.

Compare tools at toolgpa.com ›

Everything in this guide is ToolGPA’s own summary of what Web Developer’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Web Developer is a trademark of its owner, and this guide is not made, paid for or approved by Chris Pederick. Prices and plans change: check chrispederick.com before you buy.