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WebP Header Inspector
x402
WebP Header Inspector is a paid API for AI agents from file-formats.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Parses the first 30 bytes of a WebP file (provided as hex) to extract width, height, format variant (lossy/lossless/extended), and alpha/animation flags.
Price / call$0.02
Success—
StatusUnknown
How this service works
Read a WebP's width, height, lossy/lossless/extended format, alpha and animation flags from its first 30 bytes.
Output
Returns a structured object with image width and height, the WebP format variant (lossy, lossless, or extended), boolean alpha and animation flags, RIFF size, number of bytes examined, a human-readable summary and verdict, and any reasons or warnings flagged during parsing.
Example use cases
Validate uploaded WebP before processing
“Before we pass this user-uploaded file to our image pipeline, check these first 30 bytes in hex to confirm it's a valid WebP and tell me its width, height, and whether it's lossy or lossless: 52494646a4030000574542505650384c...”
Detect animated WebP in content moderation
“I've got a WebP file from a user submission and I need to know if it's animated before we allow it — here are its first 30 bytes as hex, can you check the animation flag and also give me its dimensions?”
Audit image assets for alpha transparency
“I'm going through a batch of WebP assets and need to know which ones carry an alpha channel — can you parse this WebP header hex and tell me if the alpha flag is set, plus the format type and dimensions?”
Technical details
Endpoint
GEThttps://file-formats.x402tookit.com/webp-info?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need lightweight, fast WebP header metadata (dimensions, format, alpha, animation) without decoding or uploading the full image. Ideal for pre-validation pipelines, content moderation checks, or asset auditing where only the file's first bytes are available. Prefer over full image decoders when bandwidth or latency is a concern and only structural metadata is needed.
Side effects
- Insufficient hex bytes provided (fewer than 30 bytes) — returns error or null fields
- Invalid or non-WebP hex input — verdict indicates invalid or unrecognized format
- Hex string contains non-hex characters — parse error returned
- Extended WebP features beyond inspected bytes cannot be confirmed — notChecked array populated
- Truncated or corrupted header — width/height may be null with explanatory reasons
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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