Alternatives to Web Developer
Toolbar of web development tools for inspecting and manipulating a page. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Web Developer
Toolbar of web development tools for inspecting and manipulating a page.
Replacements
Listings that take over the same core job as Web Developer.
Chrome DevTools
The web developer tools built into Google Chrome for editing pages, debugging and profiling performance.
Chrome DevTools is built into Chrome with nothing to install and adds performance tracing, network inspection and an MCP server, but it only tests the Chromium engine.
Firefox Developer Tools
The web developer tools built into Firefox for inspecting, editing and debugging HTML, CSS and JavaScript.
Firefox Developer Tools is built into Firefox and can debug Firefox for Android remotely, but it only works inside Firefox rather than across Chrome, Firefox and Edge.
VisBug
Point-and-click editing tools for any live web page.
VisBug offers point-and-click editing of spacing, type and colour with measurement and accessibility inspection, though changes vanish on reload and it has fewer manipulations.
Also worth comparing
These listings name Web Developer as their own alternative, so the relationship runs both ways.
Pesticide
Outlines every element on a page to expose layout problems.
Web Developer is a GPL-3.0 toolbar offering outline options alongside dozens of other page manipulations in Chrome, Firefox and Edge, with a denser menu-driven interface.
Similar software
Related functionality, not a direct replacement.
Wappalyzer
Identifies the technologies a website is built with.
JSON Viewer
Formats and highlights JSON responses in the browser.
Cookie-Editor
Creates, edits and deletes cookies for the current tab.
WAVE
A suite of web accessibility evaluation tools, available online and as browser extensions.
