Free tool

Increase image size in KB

When a form wants a file of at least 20 KB and your scan is only 8 KB, Arche makes it bigger: first by saving it at full quality, then by adding a padding block inside the JPG. The pixels and the picture stay the same. Set the minimum you need; it starts at 20 KB.

Free, no sign-up
Runs in your browser, nothing uploaded
Many images at once

Increase size in KB

On this device

Drop images hereWebP, PNG, JPG, GIF, BMP or AVIFChoose imagesProcessed on your device. Nothing is uploaded.

Form preset

Maximum size (KB)

Each file comes out between 20 KB and 50 KB. Files that would be smaller are padded up; the picture stays the same.

Form requirements: minimum, pixels, DPI

Minimum size (KB, optional)

Width (px)

Height (px)

Fill in both for an exact pixel size, as many exam and ID forms ask.

DPI (optional)

Black and white

For forms that ask for a black-and-white signature.

Allow smaller dimensions

When the quality would have to drop below 60, scale the image down instead until it fits.

Output format

Your browser decodes and re-saves each image. Nothing is sent to Arche's servers, and re-saving drops EXIF metadata such as GPS location.

Guide

Good to know

How the file gets bigger

A JPG can carry comment blocks that viewers and portals skip when they show the image. Arche adds just enough of them to bring the file over your minimum, counting 1 KB as 1,024 bytes so that forms counting either way accept it. The maximum keeps the file from growing past what the form allows.

More pixels instead

If the form wants more pixels rather than more kilobytes, enter the width and height under Form requirements. Arche scales the image to that size and then fits it into your KB range. Enlarging adds no detail, so start from the largest copy of the photo you have.

Photo and signature sizes for common forms

Pick one of these under Form preset and Arche sets the size range, pixels and DPI for you. The figures come from each body's published upload instructions, checked in November 2026. They can change between notifications, so check yours before you upload.

Photo and signature sizes for common forms
Document	Pixels	File size	DPI
IBPS / SBI photo	200 × 230	20–50 KB	—
IBPS / SBI signature	140 × 60	10–20 KB	—
IBPS / SBI left thumb impression	240 × 240	20–50 KB	200
IBPS / SBI handwritten declaration	800 × 400	50–100 KB	200
SSC signature	Any	10–20 KB	—
NEET UG / JEE Main photo	Any	10–200 KB	—
PAN photo, Protean (NSDL)	197 × 276 (3.5 × 2.5 cm)	up to 50 KB	200
PAN signature, Protean (NSDL)	354 × 157 (2 × 4.5 cm)	up to 50 KB	200
PAN photo, UTIITSL	213 × 213	up to 30 KB	300
US visa photo (DS-160)	600 × 600	up to 240 KB	—

Photo and signature sizes for all exams

FAQ

Frequently asked questions

Something else? Write to support@niamori.ai.

Can I increase image size in KB without changing pixels?

Yes, that is what this page does: the width and height stay as they are and only the file grows, first through full-quality saving and then through padding.

Will the photo look different?

No. Saving at full quality can only make it sharper, and the padding block is not part of the picture.

Are my images uploaded?

No. The conversion runs inside your browser, so your images stay on your device. Files are only uploaded if you choose to optimize them with Arche, and those are deleted within 48 hours.

What is Arche?

Arche makes JPEG, PNG and WebP images smaller without changing their format or pixel size, and strips metadata such as EXIF location. It is free without an account; Pro raises the batch limits.

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Need smaller files, not just a new format?

Arche recompresses JPEG, PNG and WebP in the same format and size. Free without an account; files are deleted within 48 hours.

Optimize images See pricing