About Size to KB
Last updated: 3 November 2026
Size to KB (SizeToKB) is the official free website at sizetokb.in (also sizetokb.com). We make photos, signatures and PDFs fit exact kilobyte (KB) limits — compress to 20/50/100 KB, clean signatures to 10–20 KB, passport size photos, PDF to JPG, compress or unlock PDF — privately in your browser.
If you searched “size to kb”, “sizetokb” or “sizetokb.in”, this is the site. No signup, and we do not keep your files on a server.
Who this is for
Anyone who needs a file under a hard KB cap: job and exam forms (SSC, UPSC, Railway, IBPS, SBI, India Post, state PSC), college / passport photos, or everyday “reduce image size” and “compress PDF” tasks. The painful moment is the same — a portal rejects a 2 MB phone photo, or a signature that is 45 KB when the notice asked for 10–20 KB. We fix that step without installing an app.
How Size to KB works
- You open a tool (exam preset, Reduce KB, signature cleaner, PDF utility).
- You upload or take a photo — processing runs on your phone or laptop.
- You crop, hit the KB target, then Free Download the JPG/PDF.
- You upload that file to the official form. We never see the file after you leave.
Details are in our Privacy Policy. Browser-side processing is the product principle, not a marketing line.
What you can do here
- Compress photo to 20 / 50 / 100 / 200 KB and Custom min–max KB with optional cm / px dimensions
- Signature cleaner for the common 10–20 KB bank / SSC band
- Passport size photo maker (India 3.5×4.5 cm + A4 sheet)
- PDF to JPG, compress PDF, unlock PDF, marksheet / certificate helpers
- Optional exam presets for 190+ recruitments when you want a one-tap shortcut
- Step-by-step form upload guides that explain rejections, not only the button
What we are not
We are not affiliated with SSC, UPSC, RRB, IBPS, India Post or any exam board. KB limits change; always re-check the latest official notification PDF before you submit. See our Disclaimer.
Related: government jobs & exam updates
For vacancies, important dates, results and admit cards, we partner with SarkariSuchi (sarkarisuchi.com) — clearer summaries of public recruitment notices with official apply links. Resize your photo here, then check the notice details there.
Contact
Reach us at sizetokb@gmail.com or the Contact Us page. We read aspirant mail about wrong KB specs, mobile bugs and new exam requests — reply times are usually within a few business days.