Compress Image to 30 KB — Free & Online
Compress a photo, signature or small scan to 30 KB for ID applications, KYC uploads and forms that set this limit. It is a little more generous than 20 KB, and that extra room shows.
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Who needs a 30 KB image?
30 KB turns up on ID card applications, bank and insurance KYC uploads, college admission systems and some recruitment forms. It is half as much again as the 20 KB tier, which in practice means a face can stay sharp rather than merely recognisable. It is still too small for a full-page document in colour, so scans need care.
- Bank, insurance and mutual fund KYC forms that commonly ask for a photo or signature under 30 KB.
- Railway and other recruitment forms where the signature or photo commonly has a band such as 30 KB to 50 KB. Check the notification, because the minimum matters as much as the maximum.
- College and school ID card portals, which often want a recent headshot under 30 KB.
- Housing society, club and gym membership apps that keep a small photo of each member.
- Online forms that ask for a small proof such as a fee receipt or a section of a document, rather than a full page.
Limits change between years, so confirm the exact 30 KB figure in your official notification or in our exam photo size list.
What to expect at 30 KB
A passport-style photo at 30 KB looks clean at the size these forms display it. Skin tones stay smooth and edges stay defined. A signature will be far below the limit. Scanned text is the hard case: it can be made to fit, but small print starts to blur unless the scan is greyscale and cropped tightly.
Recommended dimensions for a 30 KB file
Pixel count drives file size, so if your form states no dimensions, resize to one of these before compressing to 30 KB with the image resizer.
| Image type | Pixels | Notes |
|---|---|---|
| Passport-style photo | about 300 × 400 to 450 × 600 | The extra room over 20 KB lets you keep a slightly larger photo with natural skin tones. |
| Signature | about 280 × 160 to 600 × 200 | Comfortably under 30 KB. If a form sets a 30 KB minimum, use the upper end of this range. |
| Receipt or small proof | about 700 × 900, greyscale | Crop to the part that matters, such as the amount and reference number, so the text stays legible. |
| Full A4 page | about 800 × 1130, greyscale | Large print stays readable; fine print usually does not. Use a larger size limit if the form allows it. |
Which format to use for 30 KB
JPG for photographs and signatures. For a scanned document, convert it to greyscale before compressing if your scanner app allows it. Removing the colour information leaves more of the 30 KB for the text itself.
Worked example: getting a file to 30 KB
- Start point: a bank KYC form asks for a photo under 30 KB and you have a recent phone photo of about 3 MB.
- Crop to head and shoulders with a little space above the head. Keep the face roughly in the centre.
- Resize to about 400 × 500 pixels, or to the dimensions the form gives.
- Upload here with the 30 KB target already filled in and the format set to JPG, then compress.
- Look at the result at full size. At these dimensions a face typically comes through clean, and the file usually sits a little under 30 KB.
A scanned A4 page in colour is often well over 1 MB. In greyscale, cropped to the printed area and resized to about 800 pixels wide, it can usually be brought to 30 KB with large text still readable. Small print and stamps are what suffer first.
These 30 KB figures are typical and approximate; your own image may land a little differently.
Getting the best result at 30 KB
- Scan documents in greyscale; colour scans waste bytes on paper tone
- Crop blank margins off a scan before compressing
- A head-and-shoulders photo works better than a full-body shot
Common mistakes at 30 KB
- Photographing a document at an angle. The tilted page has more background and uneven light, and the text ends up both smaller and blurrier.
- Uploading a HEIC photo straight from an iPhone. Many forms accept only JPG; convert it first, or set the iPhone camera to save in the Most Compatible format.
- Using flash on glossy documents or ID cards. The glare patch hides text, and compression makes it worse.
- Choosing 30 KB when the form actually says 30 KB to 50 KB. A result just under 30 KB would fail the minimum; in that case target about 45 KB instead.
30 KB compression: frequently asked questions
My scanned document looks blurry at 30 KB. Why?
JPG blurs hard edges such as text when it compresses hard. Scan or convert to greyscale, crop away blank margins and keep the width around 800 pixels. If the text is still hard to read, the page needs a larger size limit than 30 KB.
Can I compress a signature to 30 KB?
Easily. A signature is mostly white space and usually compresses to well under 30 KB while staying crisp. The more common problem is a minimum limit, not the maximum.
Is 30 KB enough for a KYC photo?
Yes, for a head-and-shoulders photo. At around 400 × 500 pixels it stays sharp. If the institution also asks for a specific background colour or size, follow that first, then compress.
Can I upload a photo of my Aadhaar or PAN card at 30 KB?
It depends on the site, and many ask for a PDF or a larger image for documents. If an image is accepted, crop to the card edges, keep it upright and check that the number is readable after compression.