A measured example
| Recipe | Range 20–50 KB, Light (88), may enlarge up to 1200 px |
|---|---|
| Before | 7.4 KB · 480 × 360 · JPEG |
| After | 25.8 KB · 622 × 467 · JPEG q88 |
| Change | +247.2% |
What this does
Increase photo size in KB to reach a form’s minimum: the desk starts at a 20–50 KB range written as JPEG, raises the quality first and then the pixels, up to 1200 px on the long edge. The honest limit: some tiny, plain images cannot reach a minimum without padding, and this site will not pad.
When to use this, and when not
- Use it when a portal says your photo or signature is below its minimum.
- If the form also states pixels and DPI, compress photo for exam form sets all of them from a sourced preset.
- If your file is too big rather than too small, use reduce photo size in KB.
Honest limits
- Enlarging adds pixels, not detail. A photo enlarged to reach a minimum looks the same, slightly softer, at the larger size.
- The enlargement stops at the long edge set here (1200 px to start), however far the file is from the minimum.
- A form's pixel size, if it states one, wins: set it under Dimensions as an exact size, and only the quality is used to reach the minimum.
Privacy on this page
Capture information is kept here; remove it on the recipe bar if the form does not need it. Read KB and pixels for how size in KB, pixels and DPI relate.
Questions
Why do forms set a minimum size?
A file that is very small is often a thumbnail, a screenshot of a photo or a scan at the wrong setting, and portals use a minimum in KB as a rough check that the picture has enough detail. A minimum of 10 or 20 KB is common for photos and signatures.
How is the size increased?
Two honest ways, in this order. First the photo is re-encoded at a higher quality, up to 95, which keeps more detail and makes a bigger file. If that is still under the minimum, the photo is enlarged step by step, up to 1200 pixels on the long edge on this page (change it in the Recipe panel). Each row says which was done.
Why not just add filler bytes?
Because a file padded with junk is the same picture pretending to be bigger. Some portals check the picture, not only the number, and a padded file can also be rejected or flagged. This site never pads; if a photo cannot honestly reach the minimum, its row says so with its real size.
When can it not be done?
When the photo is tiny and plain, such as a small signature on white paper: even at quality 95 and a larger size it may stay under 10 KB. Scan or photograph it again at a higher resolution, and the minimum is easy.
More on this site: all tools.
Other jobs
More ways to shrink a photo
- Compress photosOne photo or a whole folder, one recipe, a skyline of sizes with a line you drag, and a receipt for every file.
- Compress JPEGOne quality number for every JPEG, printed on every row; capture information kept or removed.
- Compress PNGA 256 or 128-colour palette against a lossless pass, the smaller kept, transparency intact.
- Compress WebPLossy WebP at a quality you choose, or lossless with every pixel compared.
- Compress iPhone photosHEIC to small JPEG where your browser can open HEIC, with every format change stated on its row.
- Compress image without losing qualityNo re-encode: JPEG Huffman tables rebuilt, PNG recompressed, pixels compared before a row says identical.
- Reduce photo size in KBType a KB target or a range. Quality first, then fewer pixels, checked against the exact bytes written.
- Compress photo to 20 KBSignature-sized limits: the pixels come down as well as the quality, with a legibility floor.
- Compress photo to 50 KBThe 20–50 KB range bank and PAN-style forms ask for, with both ends checked.
- Compress photo to 100 KBQuality first, pixels kept where they can be: the common portal upload limit.
- Compress photo to 200 KBSharp enough to print, under 200 KB: usually quality alone gets there.
- Compress photo to 1 MBMB-scale limits for listings and portals: quality first from 88, pixels only if they must.
- Compress photo for exam formSourced, dated presets for bank, PAN, NEET, SSC and US visa uploads, with a PASS or FAIL line per file.
- Compress signature to 20 KBPaper whitened, ink darkened, cropped to the ink, sized to 140 × 60 and checked.
- Compress photos for emailA per-file ceiling and a measured total for the set, to check against the attachment limit.
- Compress a photo libraryStorage framing: folder structure preserved, originals untouched, gigabytes counted.
- Compress images for websiteWebP at quality 80, long edge 1920, capture information removed, folders kept.
- Reduce image resolutionFewer pixels by percent, exact width × height, long edge or megapixels, at a light quality.