Resize Image to 300×100 Pixels
Resize a signature, logo or banner to exactly 300×100 pixels (300*100, 3:1) without stretching. Crop to fill or pad; save JPG, PNG or WebP under 100 KB.
Smart target workflow
Resize to 300 × 100px without guesswork
Batch up to 50 images, review the real output, then download images, ZIP or a combined PDF.
300 × 100 pixels in short
300 × 100 means 300 pixels wide and 100 pixels tall: a 3:1 strip with 30,000 pixels in total. Upload a JPG, PNG or WebP, leave "Crop to fill" selected, drag the preview until the part you need sits inside the frame, then download. The file is exactly 300 × 100 and nothing is stretched.
File size is rarely the problem at this size. Every file we produced on this page came out between 2.3 and 29.6 KB, so a "not more than 100 KB" rule is met easily. A minimum such as "10 to 20 KB" is the limit you are more likely to miss.
Where a 300 × 100 image is asked for
Signature uploads
The Indian OCI application asks for a signature image with a 1:3 height-to-width ratio, at least 200 × 67 and at most 900 × 300 pixels, in JPG. 300 × 100 sits inside that range. Exam and job portals also use a wide signature strip, but usually with different numbers, so compare the table below with your notice before you settle on 300 × 100.
Small mobile ads
Google's Authorized Buyers ad-size guide lists 300 × 100 as a mobile-friendly web size. It is a different slot from the 320 × 100 and 320 × 50 mobile banners, so a creative made for one of those will not fit this one.
Logo and banner slots
Sponsor strips, directory listings and email-signature banners sometimes fix the slot at 300 × 100. A square logo is the awkward case: "Crop to fill" cuts off its top and bottom, so use "Fit inside, pad" with a solid or transparent edge instead.
Signature sizes on common application portals
Several portals ask for a wide signature, but only some of them accept 300 × 100. These are the published rules we checked.
| Portal | Pixel size | Shape | File size | Does 300 × 100 fit? |
|---|---|---|---|---|
| OCI (India) | 200 × 67 to 900 × 300 | 1:3 (height to width) | Not stated on the embassy page | Yes, it is inside the range |
| SSC CGL 2026 | About 6.0 × 2.0 cm (236 × 79 at 100 pixels per inch) | About 3:1 | 10 to 20 KB | The shape matches, but a 300 × 100 JPG is usually under 10 KB |
| IBPS | 140 × 60 (preferred) | 7:3 | 10 to 20 KB | No, use 140 × 60 |
| UPSC | 350 to 1000 on each side | Any within the range | 20 to 100 KB | No, 100 pixels is below the 350 minimum |
Sources: OCI instructions on eoiasuncion.gov.in; SSC CGL 2026 notice, para 9.6; UPSC CAPF (AC) 2026 notice and the upsconline FAQ; IBPS online registration guidelines. Checked in October 2026. Rules change between recruitment cycles, so the notice for your own application is the one that counts.
How to make a 300 × 100 image without stretching it
Start from a clear original
For a signature, sign in black or dark blue ink on plain white paper and photograph it in daylight so the ink fills most of the frame. Indian embassy guidance asks for the signature to cover 80 to 85% of the box.
Upload the file
Drop a JPG, PNG or WebP on the tool. The preview compares the shapes, for example "Source is 4:3, target is 3:1 — cropping to fill."
Choose how to fit 3:1
"Crop to fill" keeps the exact size and trims the excess. "Fit inside, pad" keeps the whole picture and fills the sides. "Stretch" gives the exact size by distorting the image, so use it only when that does not matter.
Position the crop
Drag the preview, or use the arrow keys, until the signature or subject is inside the frame. From a 4:3 phone photo, crop to fill keeps a band only 44% as tall as the original, so position matters.
Download and check
Keep JPG unless the form asks for PNG, then download. The file name ends in -300x100 and the results panel shows the final size in KB, so you can compare it with the form before uploading.
What we got from real files
We ran four test images through this page in Chrome on 18 October 2026. Each file took under half a second. The sizes are the ones the results panel reported.
| Input | Setting | Output | What to notice |
|---|---|---|---|
| 4032 × 3024 phone photo of a signature, JPG, 1.91 MB | Crop to fill, JPG | 300 × 100, 4.3 KB | Kept a 4032 × 1344 band around the ink; the paper above and below was removed. |
| The same photo | Fit inside, pad, JPG | 300 × 100, 3.1 KB (blurred edges) or 2.8 KB (solid edges) | The whole photo shrinks to 133 × 100 in the middle, so the signature becomes very small. |
| The same photo | Fit inside, no padding, JPG | 133 × 100, 2.3 KB | Not 300 × 100. A form that checks dimensions will reject it. |
| 1200 × 400 signature scan, PNG, 16.9 KB | Crop to fill, JPG or PNG | 300 × 100, 3.6 KB (JPG) or 5.1 KB (PNG) | Already 3:1, so nothing was cut. Both files are below a 10 KB minimum. |
| 1000 × 1000 square logo, PNG, 40.2 KB | Fit inside, pad, PNG | 300 × 100, 29.6 KB (blurred edges), 5.4 KB (solid), 5.5 KB (transparent) | Blurred edges add detail the encoder has to store. A solid or transparent edge is five times smaller. |
| 1600 × 900 landscape photo, JPG, 204.2 KB | Crop to fill: JPG or WebP; Stretch: JPG | 8.3 KB (JPG), 9.9 KB (WebP), 7.4 KB (stretched JPG) | WebP was larger than JPG here. Stretching squashed everything to about 59% of its height. |
When this page is not the right tool
- A minimum file size. A 300 × 100 signature JPG usually comes out at 3 to 6 KB, and this page has no setting to make a file bigger. For SSC, UPSC or IBPS, use the Signature Resizer: it has those presets, saves the JPG at full quality and tells you whether the result lands inside the KB range.
- A size range. If the form says something like "300 × 100 to 600 × 200", any 3:1 size in that range is valid. 300 × 100 gives the smallest file; 600 × 200 keeps thinner pen strokes readable. Enter 600 × 200 in Resize Image to make the larger version.
- A source smaller than 300 × 100. The tool will enlarge it, and the result will look soft. Scan or photograph the original again instead.
- Transparent edges in JPG. JPG has no transparency, so padded edges become a solid colour. Choose PNG or WebP if you need them transparent.
- Different settings per file. You can add several images at once, but they share one fit mode and one format. The crop position can still be set for each image.
Frequently asked questions
Is 300*100 the same as 300 × 100 pixels?
300*100, 300x100, 300 × 100 and "300 by 100" all mean 300 pixels wide and 100 pixels tall. Width comes first. 100 × 300 would be a tall, narrow strip, which is almost never what a form means.
How many KB is a 300 × 100 image?
It depends on the format and the content. In our tests, JPG and WebP files were 2.3 to 9.9 KB and PNG files 5.1 to 29.6 KB. Even uncompressed, 30,000 pixels of colour take 90,000 bytes, about 88 KB.
The form says "JPG format, 300x100 pixels, not more than 100 KB". Will this file pass?
Yes, if you leave the format on JPG and do not choose "Fit inside, no padding": the tool writes exactly 300 × 100 pixels and every result we measured was far under 100 KB. Check whether the same notice also sets a minimum size.
Why is part of my signature cut off?
Your photo is taller than 3:1, so "Crop to fill" removes the top and bottom. Drag the preview until all of the ink is inside the frame, or switch to "Fit inside, pad" to keep the whole image.
Can I use a 300 × 100 image for a 320 × 100 ad?
No. They are separate ad sizes, and 320 × 100 is slightly wider (3.2:1). Make a new file at 320 × 100 rather than letting the ad server rescale this one.
Are my images uploaded to a server?
No. Resizing runs in your browser, and the image files are not sent to MAXScanner.
Next steps for your file
Related image tools
Check the destination requirement
Upload rules change between services. MAXScanner prepares the file you request, but the receiving form or service is authoritative for its current pixel, format and byte limits.