Image Photo and Signature Size Validator - (4 format)

What the validator checks

The tool accepts an image file and compares it with a rule set. A rule can come from an exam preset loaded from the site's database or from the custom-rule panel. The result cards list each check with the required value, the actual value and a pass or fail status.

The standard checks are width, height, file size and format. The custom panel also exposes a minimum DPI field and a tolerance range. The browser card shows what it can measure locally; the cloud card shows the final server result after the file is uploaded.

A green result means the file matches the stored rule. It does not mean the exam authority will accept the photo itself. Composition, background, recency and facial expression are separate requirements that a size validator cannot judge.

Choosing an exam or a custom rule

Use the exam search when the tool lists the exam you need. Select the exam, then choose the document type: photo, signature or document. If the exam has several variants, pick the one that matches the instructions you were given. The variant list can be searched when it is long.

Use the custom-rule panel when you have a requirement that is not in the list. Enter the width and height, choose the unit, set the minimum DPI if you know it, and add a tolerance if the rule allows a range. You can also set a minimum and maximum file size and choose the accepted format.

Custom rules are only as good as the numbers you enter. Copy them from the authority's current instructions, not from an old forum post or a screenshot.

Units and tolerance

Dimensions can be entered in pixels, centimetres, millimetres or inches. The validator converts them to a comparable form before checking. A tolerance from 0 to 20 lets you accept a small difference around the target; keep it at 0 when the rule is exact.

File size can be expressed in KB or MB. The server treats 1 KB as 1024 bytes and 1 MB as 1024 KB. That matters near a boundary: a file described as “under 50 KB” may fail if the portal uses a different convention.

DPI is a metadata value. The browser reports it as unverifiable, and the server's check is based on the dimensions and file properties rather than a true print-resolution inspection. If an exam explicitly requires 300 DPI, set the DPI when you create or export the image and confirm it in an image editor.

How to validate an image

1. Select an exam preset or open the custom-rule panel.
2. Choose photo, signature or document.
3. Set the tolerance and, for a custom rule, the dimensions, DPI and size limits.
4. Upload the image by clicking the dropzone or dragging a file onto it.
5. Click Validate.
6. Read the browser pre-check first, then the cloud final result.
7. Fix the file and run the check again if any row is red.

The upload accepts common image types and is capped at 10 MB. A larger file is rejected before the detailed checks. The server also limits the upload to 10 MB, so passing the browser stage does not guarantee the cloud stage will accept it.

Reading the result cards

Each row shows a check name, the required value, the actual value and a status. A pass means the actual value is within the rule. A fail means at least one value is outside the allowed range. The overall badge summarises the file, but read the individual rows to see which dimension or limit caused the failure.

The format check compares the file extension on the server. A file renamed from PNG to JPG may pass the extension check even though its internal encoding is different. If a portal is strict about the actual file type, re-export the image in the required format rather than renaming it.

If the browser and cloud results disagree, trust the cloud result for the final decision. The browser may not be able to read every property, and the server applies the authoritative rule set.

Common mistakes

• Checking the wrong variant: a photo rule and a signature rule are not interchangeable.
• Using an old preset: requirements change between exam cycles. Confirm the current notice.
• Ignoring the minimum size: a file can be too small as well as too large.
• Renaming the extension: that does not convert the image format.
• Assuming DPI was verified: the browser cannot confirm it, and the server check is limited.
• Forgetting composition rules: size is only one part of an exam photo requirement.

Privacy and limits

The file is uploaded to the server for the cloud check. Do not upload an image you are not allowed to share. The page does not create an account or keep a personal gallery, but the uploaded file travels over the network and is processed by the validation endpoint.

The validator is a size-checking aid, not an approval service. It cannot guarantee that an exam portal will accept the file. Always download the official instruction sheet for the current cycle and follow the authority's own portal.

Use the result to catch avoidable rejections, then review the photo itself: recent, clear, correct background, no filters, correct signature style. A technically valid file can still be rejected for content reasons.

Preparing a file that passes

Start from the largest, highest-quality original you have. Crop to the required aspect ratio, then resize to the exact pixel dimensions. Export in the required format and choose a quality that keeps the file under the maximum size without making the face or signature muddy. Check the result at 100 percent zoom before uploading it to the validator.

For a signature, scan or photograph on plain white paper with dark ink, then remove the background if the instructions allow it. Keep the strokes thick enough to survive compression. For a photo, use even lighting, a plain background and a recent image. A technically perfect file can still fail the exam's content rules.

After exporting, check the file's properties: dimensions, file size and format. If the validator reports a mismatch, fix the source rather than repeatedly re-uploading the same file. Save the final version with a clear name and keep the original so you can re-export if the requirement changes.

Frequently Asked Questions