Read optional EXIF resolution hints without pretending WebP has a native DPI field or that one number determines image quality. The report identifies horizontal and vertical resolution values, their declared unit, and the limits of using that metadata in print workflows.
How to use DPI/PPI Checker
- Select a WebP whose print-size or resolution metadata is being questioned.
- Run the checker and review XResolution, YResolution, ResolutionUnit, EXIF status, and parsing notes.
- Use actual pixel dimensions plus the intended physical output size to calculate effective PPI in the destination application.
What this tool is good at
When to use DPI/PPI Checker
Investigate EXIF resolution hints from actual bytes
Clarify a print or publishing question without confusing optional XResolution and YResolution metadata with the actual pixel grid. Use the selected WebP container as evidence instead of trusting only a filename, a browser preview, a rounded file-size label, or an assumption about what an exporter usually writes.
Prepare a reviewable metadata handoff
Read both values and ResolutionUnit, then calculate effective PPI from pixel dimensions and intended physical size in the real layout or production application. Keep the local report or focused derivative with the related privacy review, preservation record, color decision, publishing ticket, or engineering investigation so another person can repeat the check.
Inspect sensitive assets without an upload
Work with client media, personal photographs, research imagery, unreleased campaigns, and internal diagnostics in the current browser tab without creating a remote image-processing job.
How to choose the right settings
Define the decision before reading the result
Clarify a print or publishing question without confusing optional XResolution and YResolution metadata with the actual pixel grid. Decide whether the goal is identification, privacy, preservation, interoperability, print planning, or container debugging because the same stored field can have different consequences in each workflow.
Separate a stored claim from proven reality
Read both values and ResolutionUnit, then calculate effective PPI from pixel dimensions and intended physical size in the real layout or production application. Metadata can be missing, stale, edited, malformed, application-specific, or inconsistent with pixels; verify important conclusions against the authoritative record and destination application.
Retain and verify the original
A 300-value tag does not create pixels, restore detail, prove focus, establish viewing distance, or make a low-resolution source suitable for a particular print. Keep the original until the downloaded report or derivative has been reopened, compared, and accepted by the person responsible for publishing or preservation.
Practical workflow and output details
The report uses the bounded EXIF parser and explicitly returns a null native WebP DPI field because the WebP container defines no such field. Processing uses bounds-checked RIFF and TIFF reads, typed arrays, local Blob output, and Canvas only when visible orientation must be normalized; selected image bytes are never posted for processing.
A 300-value tag does not create pixels, restore detail, prove focus, establish viewing distance, or make a low-resolution source suitable for a particular print. Government and institutional research links are presented as supporting references for format terminology and risk context, not as endorsements of PicConverters or proof that one focused tool satisfies every policy.
Format behavior and limitations
WebP container syntax does not define a native DPI field; this checker reports optional EXIF resolution metadata when present.
Changing an EXIF resolution hint does not add pixels, recover detail, improve focus, or establish an acceptable print size by itself.
Government and research sources
These references support the format facts, metadata terminology, and privacy context explained on this page. They do not endorse PicConverters.
Defines image orientation and spatial-resolution concepts used in digital image metadata.
Institutional guidance on retaining and interpreting embedded image metadata in practical collections.
Frequently asked questions
Does WebP have a standard DPI field?
No. A WebP may carry resolution hints inside optional EXIF metadata.
Is 300 DPI always print ready?
No. Effective PPI depends on pixel dimensions divided by the actual printed dimensions, plus viewing and production requirements.
Why are X and Y values separate?
EXIF stores horizontal and vertical resolution independently, though ordinary images often use the same value for both.
Related WebP tools
WebP Dimensions Checker
Read WebP width, height, aspect ratio, megapixels, and animated canvas size directly from VP8X, VP8, or VP8L headers.
WebP EXIF Viewer
Locate the WebP EXIF chunk and parse bounded TIFF IFD tags such as camera, date, orientation, exposure, dimensions, and GPS fields.
File Size Checker
Measure exact WebP bytes, KiB, MiB, RIFF coverage, payload, metadata overhead, trailing bytes, and bits per pixel.