Portals reject uploads mainly for three reasons: the file is in the wrong format (many accept only JPG/JPEG, some also PNG or PDF), the file size is outside the allowed window in kilobytes (an exam photo might need 20–50 KB, a signature 10–30 KB, a document up to 1–2 MB — both a minimum and a maximum can apply), or the pixel dimensions or aspect ratio don’t match (for example ~200×230 px for an exam photo, or 35×45 mm ≈ 413×531 px for a passport photo). Some portals also cap the number of PDF pages. AnyTool’s Portal Upload Validator measures your file and shows each rule as pass, warn or fail with your value beside what’s required, so you can see precisely what to fix — and for images, fix it in one click. Because exact specs differ per portal and change, always confirm the official requirement on the portal or notification itself.

For image files, the Auto-fix button does the work for you. It resizes the picture to the target pixel size using a high-quality resampler (it cover-crops to an exact size, or scales to fit a min/max range), converts PNG or other formats to JPEG on a white background when the spec needs JPEG, and binary-searches the JPEG quality so the encoded file lands inside the required minimum-to-maximum KB window — dropping the pixel size slightly as a last resort if it’s still over the limit. It then re-measures and re-validates the result and shows a before/after of the size and dimensions before you download the compliant file. Auto-fix re-encodes the image, so compression can reduce quality and cropping to an exact size may trim the edges — always preview the result before submitting. For PDFs the tool reports the format, size and page count but does not shrink the PDF; use a separate PDF compress or split step if needed.

Nothing leaves your device. The Portal Upload Validator opens, measures and (for images) resizes, converts and compresses your file entirely on your device using the browser’s own canvas and a bundled high-quality resizer, with no server, no API and no CDN call, and it works offline once cached. Your file is never uploaded, logged or stored — which makes it safe for sensitive documents like passport photos, signatures, Aadhaar/PAN scans and other IDs, unlike many online “resize image for portal” sites that upload your file to their servers. Only the compliant file you choose to download is ever saved, and closing the tab discards everything else.

The built-in presets reflect common, widely documented specifications — an Indian govt-exam photo around 3.5×4.5 cm (≈200×230 px) at 20–50 KB in JPEG, an exam signature around 3.5×1.5 cm (≈140×60 px) at 10–30 KB, a biometric passport/visa photo at 35×45 mm (≈413×531 px) or US 2×2 in (≈600×600 px), and document scans typically capped at 1–2 MB — but these are general values, and the exact numbers vary between portals and exams and are updated over time (UPSC, for instance, can allow photos up to 300 KB while SSC leans much smaller). Treat a preset as a convenient starting point, switch to the Custom rule to enter the precise format, KB window, dimensions, aspect ratio and page limit your portal demands, and always verify against the official notification or upload page before submitting.