About this tool
Audit picture and img density-based srcset exports before release so every responsive variant keeps a predictable DPR candidate set for high-density displays.
The Image Picture Density Descriptor Consistency Checker audits srcset attributes that use density descriptors (1x, 2x, 3x) and verifies that each candidate set provides consistent, complete coverage across DPR tiers. It flags srcsets missing the essential 1x baseline, detects mixed descriptor types within a single list, and identifies asset groups where density coverage drifts between templates or page regions. The output is grouped by asset identifier for systematic pipeline fixes.
- Parses rows in URL|asset-id|srcset|status|context format and normalizes page URLs with an optional base URL.
- Flags mixed width-and-density descriptors, duplicate x descriptors, missing 1x baselines, and rows that do not cover your configured target DPR.
- Groups rows by shared asset-id values to highlight inconsistent density sets across sampled variants and prioritize critical image rows.
How to use Picture Density Consistency Checker
Enter a page URL and the tool parses every srcset attribute, classifies each candidate by its density descriptor, and evaluates coverage against your target DPR set. It reports missing descriptors, unexpected gaps between density levels, and cases where width and density descriptors are mixed in the same list. Correct the flagged entries in your image build pipeline or CMS configuration, then re-run to verify that every srcset delivers a coherent set of density-appropriate variants.
When this tool is useful
- Audit density-based srcset exports before release when templates rely on 1x/2x/3x candidates instead of width descriptors.
- Catch missing 1x baselines, weak target-DPR coverage, and oversized density-step gaps before high-DPR pages ship.
- Prioritize critical templates where shared asset-id rows drift to inconsistent density candidate sets.
Practical tips
- Treat 1x and 2x as minimum baseline coverage, then add 3x only when quality gains justify byte growth on critical templates.
- Keep descriptor type strategy consistent per srcset: do not mix width and density descriptors in the same candidate list.
- Group QA exports by page URL and asset-id so density-signature drift across template variants is visible before release.
Why people use this tool
Inconsistent density descriptors mean the browser's candidate selection becomes unpredictable: a missing 2x entry forces high-DPR devices to either upscale a 1x image or download an oversized 3x variant, neither of which is optimal. Mixing width and density descriptors in the same srcset violates the specification and produces undefined behavior across browser engines. Clean, consistent density coverage ensures every device receives a sharp image at the smallest viable file size.
Related search intents
srcset density descriptor checker, responsive image dpr descriptor audit, image 1x 2x checker, picture density consistency validator.