By size · 30 KB
Increase image
to 30 KB.
Thirty kilobytes sits in the middle of the band most recruitment and exam forms use — “between 20 KB and 50 KB”. Drop the image in and the file lands on 30 KB with the pixel grid untouched.
No upload · no sign-up · no watermark
01 · The floor
Why a form asks for exactly 30 KB
Recruitment portals and exam boards rarely name a single number. They print a range, 20 KB to 50 KB, and leave the applicant to pick. Thirty KB sits mid-band: far enough from both edges that a resubmission or a platform re-encode will not drift out of range.
Picking the middle has a practical benefit. A file pinned to the exact lower bound fails once a platform re-encodes and sheds a few bytes; one at 30 KB absorbs that drift and still stays under the ceiling.
02 · The mechanism
How the size is reached
Re-encode at the highest quality those dimensions can hold
The encoder is pushed until the file is as large as your existing pixels allow. These are real image bytes, and they survive a portal that re-encodes whatever it receives.
Top up the remainder with declared metadata
If maximum quality still lands under the target, the gap is filled with a standards-compliant segment — a JPEG comment, a PNG tEXt chunk, a WebP JUNK chunk. Every viewer ignores it; pixel data, dimensions and DPI stay untouched.
Portals that re-encode every upload will strip metadata, and the file falls back to its real-pixel weight. That is why the quality step runs first — bytes carried by pixels survive re-processing; bytes carried by metadata do not.
What stays the same
03 · Questions
Questions people actually ask
How do I increase an image size to 30 KB?
Drop the photo in, set 30 KB as the target, and press the button. The engine re-encodes at the highest quality your existing pixels allow and fills any remaining gap with a standards-compliant metadata block, so the file lands on 30 KB exactly and the width and height never change.
Why aim for 30 KB instead of 50 KB?
If a form allows up to 50 KB, the larger file is the safer pick — more of its weight is real image data. Thirty KB is for forms whose band starts at 20 KB and whose ceiling sits well below 50 KB, where landing mid-band avoids both edges.
Does the tool work for signatures as well as photos?
Yes, with one condition. A signature at 30 KB is comfortable; a full-size photograph forced into 30 KB will be downscaled, and the result panel states that before you download. Signatures, thumbnails and small ID photos are the natural fit for this size.