InspectDev
InspectDev vs Pixefy
Pixefy goes deeper on responsive QA than almost anything else. InspectDev covers responsive testing as one part of a wider inspection and audit toolkit.
Pixefy is a responsive design checker. It previews a page at several screen sizes in one tab, syncs panes or deliberately unsyncs them for close-up checks, switches and uploads user agents, captures full-page and custom screenshots, overlays device frames, measures viewports as you resize, and diffs what changes between breakpoints. It also does live text and image adjustments. Built for QA engineers, designers, and front-end teams, it is in open beta with a lifetime deal sold through AppSumo.
- ✓You need more than responsive preview — typography, colour, images, meta tags, storage, and data extraction in one place.
- ✓Responsive checks are a step in your routine, not the centre of it.
- ✓You want an inspection and audit toolkit, not a single-purpose QA tool.
- ✓You would rather not add another lifetime deal for one job.
- —Responsive QA is most of what you do.
- —You diff what changes between breakpoints instead of checking one size at a time.
- —You test device-specific behaviour with user-agent switching.
- —You hand over annotated screenshots as evidence.
| Capability | InspectDev | Pixefy |
|---|---|---|
| Multi-device preview in one tab | ✓ | ✓ |
| Sync / unsync panes for close-up checks | — | ✓ |
| Breakpoint diff tool | — | ✓ |
| Device frame overlays | — | ✓ |
| Screenshots — full page, section, selection | — | ✓ |
| User-agent switching and upload | — | ✓ |
| Live CSS editing | ✓ | ✓ |
| Live text editing on the page | ✓ | ✓ |
| Font list and font changer | ✓ | — |
| Colour picker and palette export | ✓ | — |
| Extract images and assets | ✓ | Content swap only |
| Page ruler and measurement | ✓ | Viewport only |
| SEO and meta tag inspector | ✓ | — |
| Cookie and browser storage editor | ✓ | — |
| Table capture to CSV or JSON | ✓ | — |
| Accessibility and contrast checks | ✓ | — |
| Price | $29 lifetime | Lifetime deal on AppSumo |
✓ included — not available · Features and pricing checked against each product’s public documentation, September 2026.
Responsive is one tool, not the whole product
InspectDev includes a breakpoint checker with overflow detection and a media query monitor. When the responsive pass is done, you are already in the tool that does the rest.
Depth around the preview
Fonts, colours, palettes, box models, and asset extraction are first-class tools here, not a second extension you open afterwards.
Audit tools Pixefy does not have
Meta tags, cookies, storage, tables, links, and accessibility share the same panel — one install instead of two.
Comparing what changes between breakpoints side by side is a real differentiator, and InspectDev does not do it.
Full-page, section, and custom-selection capture, annotated — exactly what QA needs to hand over.
Real device chrome and user-agent switching test behaviour a plain viewport resize cannot reach.
If your job is verifying responsive behaviour across devices, Pixefy is built around that from the ground up.
Pixefy and InspectDev overlap on live editing and both check breakpoints, but they point in different directions. Pixefy is a QA instrument: it measures, compares, and documents responsive behaviour better than InspectDev does. InspectDev is a wider bench, where responsive testing is one station among several. If you live in breakpoints, buy Pixefy. If responsive work is one step in an inspection and audit routine, stay in one tool.
See it on the page you have open
Install the free version and try it on any site — no account, no setup. Upgrade once when you want the full toolkit.
