Resize Image to 20KB

How to resize an image to 20 KB

1. Pick a JPG, PNG, WebP or iPhone HEIC picture from your device.
2. The starting cap is 20 KB. For an application asking for 10–20 KB, select that range or enter 10 in Minimum.
3. If your form is one of the presets, click it. Otherwise enter pixels or centimetres in Dimensions; leave Original selected when no dimensions are specified.
4. Inspect the preview, exact bytes and pixel dimensions before downloading.

Presets for common 20 KB uploads

Any photo selects a 20 KB maximum, Original mode and JPG, without a minimum. It keeps the original pixel dimensions. It shrinks the picture if fitting within 20 KB would need quality below 70, or if the picture is too large for the browser to draw. The message shows the new dimensions.

Driving licence photo (Sarathi) sets 10–20 KB, 420 × 525 pixels and JPG. Sarathi’s guide prefers those pixels and requires that range and format. Setting the lower bound also prevents a tiny file falling below 10 KB.

UP D.El.Ed photo: the guide asks for 3.5 × 4.5 cm and a file up to 20 KB, but does not specify DPI or file format. This preset uses 200 DPI to convert 3.5 × 4.5 cm to 276 × 354 pixels and saves as JPG. The saved JPG also records 200 DPI in the file, so document and print software read it as 3.5 × 4.5 cm.

Each named preset sets only the file size limit and the pixel size listed above, and saves as JPG. Check the photo rules in your own notice separately, for example how recent the photo must be, the background, and whether caps or dark glasses are allowed.

How much fits in 20 KB?

On 8 October 2026, we tested our own generated images, not photos of real people. Each row below uses the same phone-sized 4032 × 3024 test image: a gradient with light noise, saved as a 5 MB JPG.

A 4000 × 3000 test image filled with noise, one of the hardest kinds to compress, also fit with the Sarathi preset: 420 × 525 pixels, quality 69, 19,780 bytes. A nearly solid-colour 420 × 525 test image was only 3.9 KB at maximum quality; the Sarathi preset padded it to 11,264 bytes, leaving the picture and pixels unchanged.

For small form photos, setting the requested dimensions first can leave room for higher quality within 20 KB; without set dimensions, the tool shrinks the picture when needed and tells you the new size.

Forms that ask for 20 KB or less

Sources: Parivahan Sarathi’s Photo and Signature Scan & Upload Process (PDF), UP D.El.Ed’s photo and signature guidelines (PDF), and IBPS’s Guidelines for scanning and Upload of Documents: checked against the official documents on 8 October 2026.

Rules can change, and state portals may differ. Follow your own application screen. This table covers only file sizes and dimensions; read the original notice for other conditions.

For a phone photo or scan of a signature, use signature resize to automatically crop empty paper, whiten the background and save at 10–20 KB.

Why do forms ask for 20 KB?

Forms usually ask for small files because they use less storage and are easier to upload on slow connections. A small photo box may not need a large file.

Supported formats

Open JPG, PNG, WebP or HEIC from an iPhone. Save as JPG by default, or choose PNG or WebP. Sarathi asks for JPG, and many Indian application forms do the same. PNG has no adjustable quality; reducing pixels is its way to save space, so JPG is usually a better choice at 20 KB.

Outside Safari, the first HEIC conversion downloads a decoder of about 3 MB. All image processing takes place inside your browser. No picture is uploaded to our server.

Other sizes

For a 20–50 KB photo, compress an image to 50 KB. Below a required minimum? Increase image size in KB. For a different cap, such as 100 KB or 200 KB, reduce image size in KB.