Compress Image to KB

About the Compress Image to KB

Choose the size your form allows — 10 KB, 20 KB, 50 KB, 100 KB, 200 KB, 1 MB or any other — and add your photos. Each one is saved at the highest quality whose file is at or under that size; when even a low quality is too big, the picture is made smaller in pixels until it fits. JPG files are written with MozJPEG, Mozilla’s JPEG encoder, which is built for small files and gives the same result in every browser.

Everything happens in your browser, so private photos and signatures are never uploaded. Below the tool: the sizes that Indian exam, admission and ID forms ask for, with links to their official rules, the pixel sizes that fit, and what to do when a form counts a kilobyte as 1,024 bytes.

Common uses

• Exam and recruitment forms: IBPS, SBI, SSC, UPSC, NEET, JEE, CUET and GATE photos and signatures.
• Admission, scholarship, visa and ID applications that refuse files above a size.
• Email and chat attachments that must stay small.
• Many photos at once: each one under the same limit, downloaded as one ZIP with a pass.

Sizes that forms ask for

The largest size each form accepts, from its official rules (open the link to check your own notification: rules change from one round to the next).

Up to 10 KB

• PAN (Protean, online with scanned images) signature: at most 10 KB, JPG, 2 × 4.5 cm at 200 DPI (Protean scanning specifications)

Up to 20 KB · Compress Image to 20KB

• IBPS and SBI signature: 10–20 KB, JPG, 140 × 60 pixels (preferred) (IBPS notification, SBI advertisement)
• SSC signature: 10–20 KB, JPG, about 6.0 × 2.0 cm (SSC notice)
• PAN (Protean, online with scanned images) photo: at most 20 KB, JPG, 3.5 × 2.5 cm at 200 DPI (Protean scanning specifications)

Up to 30 KB

• Kerala PSC photo with name and date: at most 30 KB, JPG, 150 × 200 pixels (Kerala PSC photo instructions, Kerala PSC tips to applicants)

Up to 50 KB · Compress Image to 50KB

• IBPS and SBI photo: 20–50 KB, JPG, 200 × 230 pixels (preferred) (IBPS notification, SBI advertisement)
• IBPS and SBI left thumb impression: 20–50 KB, JPG, 240 × 240 pixels at 200 DPI (IBPS notification, SBI advertisement)
• CUET (UG) signature: 10–50 KB, JPG (CUET (UG) information bulletin)

Up to 100 KB · Compress Image to 100KB

• IBPS and SBI handwritten declaration: 50–100 KB, JPG, 800 × 400 pixels at 200 DPI (IBPS notification, SBI advertisement)
• NEET (UG) signature: 10–100 KB, JPG (NEET (UG) information bulletin)
• JEE (Main) signature: 10–100 KB, JPG (JEE (Main) information bulletin)
• IGNOU admission photo and signature: less than 100 KB, JPG (IGNOU online admission)

Up to 200 KB · Compress Image to 200KB

• NEET (UG) photo: 10–200 KB, JPG (NEET (UG) information bulletin)
• JEE (Main) photo: 10–200 KB, JPG (JEE (Main) information bulletin)
• CUET (UG) photo: 10–200 KB, JPG (CUET (UG) information bulletin)
• IGNOU admission qualification, experience and category certificates: less than 200 KB, JPG or PDF (IGNOU online admission)

Up to 300 KB

• UPSC photo and signature: 20–300 KB, JPG (UPSC notice)
• GATE signature: 3–300 KB, JPG, 250 × 80 to 580 × 180 pixels (GATE photograph and signature rules)

Up to 600 KB

• GATE photo: 5–600 KB, JPG, 200 × 260 to 530 × 690 pixels (GATE photograph and signature rules)

Up to 1 MB

• Indian e-Visa photo (square): 10 KB – 1 MB, JPG (Indian e-Visa instructions)

Pixel sizes that fit

How big a JPG is depends on its pixels and on how much detail they hold. These are MozJPEG sizes measured on portrait photos:

• 150 × 200 px (Kerala PSC): about 7–11 KB at quality 85, 13–22 KB at 95.
• 200 × 230 px (IBPS and SBI): about 9–14 KB at quality 85, 17–30 KB at 95.
• 413 × 531 px, a 3.5 × 4.5 cm passport-size photo at 300 DPI: about 17–29 KB at quality 75, 25–46 KB at 85 and 51–98 KB at 95.
• At quality 85, a passport-shaped portrait stays under 20 KB up to about 230 × 296 to 340 × 437 px, depending on the photo.

A busy background or a noisy, dark photo needs more bytes for the same pixels; a plain light background needs fewer. The tool measures your own photo, so its result is what counts.

1 KB: 1,000 or 1,024 bytes?

Forms differ: some count a kilobyte as 1,000 bytes, others (and Windows) as 1,024. This tool counts 1 KB as 1,000 bytes for the limit, so a file made for “under 20 KB” is at most 20,000 bytes — also under 20 KB for a form that counts 20 × 1,024 = 20,480 bytes. Each result shows its exact size.

A minimum works the other way round: a form that asks for “at least 20 KB” is safe from 20,480 bytes up. If your photo comes out below a form’s minimum, Increase Image Size in KB raises the file size without changing the picture, and the Photo & Signature Resizer keeps exam files inside both limits at once.

Pages for the most-asked sizes

The four sizes people look for most have pages of their own, each with the forms that use that limit: Compress Image to 20KB · Compress Image to 50KB · Compress Image to 100KB · Compress Image to 200KB. For a PDF instead of a photo, use Compress PDF to Size.

How this compares

• Runs on your device: your browser compresses the photos itself, so they are never uploaded.
• See it before you pay: the free preview shows each compressed photo with a MySmartCoPilot watermark. Files you download with a pass, or after unlocking one, carry only your photo: nothing of ours is added.
• You don’t need an account: no sign-up, no email address and nothing to install.

Limitations

• Up to 100 images at a time, 50 megapixels and 200 MB each.
• A very small limit (under about 5 KB) leaves room only for a tiny picture.
• Animated GIF and WebP files keep only their first frame. Transparent areas become white in JPG.
• Only the form decides what it accepts: check your notification for its pixel size, background and other rules.

Privacy

Photos are processed in your browser and never uploaded. The files you download contain no camera details, dates or GPS location.