Check the browser session that is actually running the site instead of relying only on a static support table. The tool decodes the selected WebP, attempts a tiny WebP Canvas encode, records relevant runtime APIs, and combines those results with the file's encoding, alpha, and animation structure.
How to use Browser Support Checker
- Choose a representative WebP, especially one using animation or alpha when those capabilities matter.
- Run the live checks in the exact browser and device targeted for troubleshooting.
- Download the report with the user agent and feature results, while remembering that policy, memory, damaged files, and server headers can still affect production behavior.
What this tool is good at
When to use Browser Support Checker
Ship a deliberate runtime compatibility workflow
Troubleshoot the exact browser session and a representative WebP instead of relying exclusively on a general support table. Base the result on the selected WebP's real bytes, decoded pixels, filename, or intrinsic dimensions instead of pasting a generic example that may not match the production asset.
Create an auditable engineering handoff
Attach the report to a compatibility issue with the tested file features, but repeat checks in every important browser, version, webview, and device class. Save the generated code, report, hash, placeholder, or reconstructed file with the related ticket so another developer can verify inputs and reproduce the decision.
Protect private source imagery
Process client, product, campaign, and internal WebP assets in the current browser tab without submitting selected image bytes to a remote conversion or analysis service.
How to choose the right settings
Start from the consuming system
Attach the report to a compatibility issue with the tested file features, but repeat checks in every important browser, version, webview, and device class. Confirm the real template, CSS layout, storage field, command-line version, caching policy, and browser target before treating generated defaults as production-ready.
Review size and runtime cost
Troubleshoot the exact browser session and a representative WebP instead of relying exclusively on a general support table. Compact source files can expand into long text, while hashes and inlined placeholders transfer work or bytes into HTML, CSS, application state, or client-side decoding.
Keep the original until verified
One passing session is not universal support, user-agent data may be reduced, and successful APIs do not rule out memory, policy, server-header, or damaged-file failures. Retain the authoritative source and test the result in its destination before replacing any deployed asset or automation step.
Practical workflow and output details
The browser attempts the selected-file decode and a tiny Canvas WebP encode while recording ImageBitmap, ImageDecoder, OffscreenCanvas, and WebAssembly availability. All transformation and analysis work uses bounded browser APIs, Canvas, typed arrays, or local Blob creation; only static application resources are fetched.
One passing session is not universal support, user-agent data may be reduced, and successful APIs do not rule out memory, policy, server-header, or damaged-file failures. The tool deliberately states what it does not generate, execute, deploy, prove, or preserve so a focused developer utility is not mistaken for a complete build pipeline or compatibility guarantee.
Format behavior and limitations
A successful test proves this browser session handled this operation; it is not a universal compatibility matrix for other versions, embedded webviews, or enterprise configurations.
The user-agent string is included for debugging but can be reduced or frozen by browsers and should not be treated as a secure identity signal.
Frequently asked questions
Why select a file?
A real decode test is stronger than checking only whether an API name exists, and it can include the features you actually need.
Does Canvas encode support prove animation support?
No. Canvas WebP encoding creates static images; ImageDecoder and a representative animated file are separate signals.
Does the test upload anything?
No. All probes run inside the current browser tab.
Related WebP tools
WebP Feature Detector
Detect WebP encoding, alpha, animation, dimensions, EXIF, XMP, ICC, and extended-container declarations from real bytes.
WebP Validator
Validate RIFF bounds, image payloads, animation structure, dimensions, and feature-flag consistency without altering the file.
WebP Animation Checker
Check whether WebP files are animated and report frame count, loop count, total duration, frame rectangles, delays, blending, and disposal.