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Resize an image to 128×128 pixels
To resize an image to 128×128 px, enter 128 × 128 px and save it as PNG. Shown at 128 CSS px it is sharp on a 1× screen; a 2× screen needs 256×256 px for the same spot. Cropping a 4:3 photo to fill the 1:1 square removes 25%.
128×128 px
PNG · no file-size limit · 128x128 px
No file-size limit is set: PixelFit saves at high quality and changes only the format and any pixel size you set.
Fit, background and padding crop to fill · white background
Saving presets is part of Pro.
The result appears here: the exact byte count, pixel size and quality, the size before and after, a preview and a download button.
The batch kit (one ZIP for up to 500 photos, several photos merged into one PDF) is part of Pro.
128×128 at a glance
| Pixel size | 128×128 px (16,384 pixels) |
|---|---|
| Aspect ratio | 1:1, square (width ÷ height = 1) |
| Megapixels | 0.0164 MP |
| Decoded in memory | 64 KB RGBA · 48 KB RGB |
| Sharp on screen at | 128×128 CSS px at 1×, 64×64 at 2×, 43×43 at 3× density |
| Estimated JPEG (outdoor photo, quality 75) | 4.9 KB |
| JPEG without a KB limit (panel default, quality 85) | 6.4 KB |
| Estimated PNG (flat graphic) | 4.8 KB |
What 128×128 means in pixels
128×128 is a square, 128 pixels on each side, 16,384 pixels in total (0.0164 megapixels). Its sides reduce to 1:1 (1 as a decimal), so any picture cropped to 1:1 scales to it without distortion.
It is thumbnail scale: a 12 MP phone photo carries 744 times more pixels, so the resize discards most of them and the stepped downscale matters for sharpness. On a 2× (high-density) screen this file is sharp at 64 CSS px, on a 3× phone at 43 CSS px; a print at 300 DPI would be only 10.8 mm wide, so it is a screen-only size.
Decoded for editing it occupies 64 KB of memory (4 bytes per pixel); uncompressed 24-bit RGB would be 48 KB, which is why the downloadable JPEG, PNG or WebP is far smaller.
Where 128×128 is used
Each line comes from the page listed under Sources, checked October 2026. Platform sizes change, so check the source before you rely on it.
- Listed in the example icon set of a web app manifest.
Getting 128×128 from a phone, camera or screenshot
Filling 128×128 from a 12 MP phone photo (4032×3024, 4:3) loses the least (25%); a vertical phone video frame (1080×1920, 9:16) loses the most (43.8%). "Fit inside" keeps the whole picture instead and the file comes out at the size in the last column; "Pad with colour" adds bars to reach the full 128×128. From the phone photo PixelFit takes the 3024×3024 crop through 1512×1512, 756×756, 378×378 and 189×189 before the last step to 128×128, so each pass blends neighbouring pixels instead of skipping them.
| Starting image | Crop to fill keeps | Area lost | Scale | Fit inside gives |
|---|---|---|---|---|
| 12 MP phone photo (4032×3024, 4:3) | 3024×3024 (left and right cut) | 25% | 0.042× (reduced) | 128×96 |
| 24 MP camera photo (6000×4000, 3:2) | 4000×4000 (left and right cut) | 33.3% | 0.032× (reduced) | 128×85 |
| Full HD screenshot (1920×1080, 16:9) | 1080×1080 (left and right cut) | 43.8% | 0.119× (reduced) | 128×72 |
| Vertical phone video frame (1080×1920, 9:16) | 1080×1080 (top and bottom cut) | 43.8% | 0.119× (reduced) | 72×128 |
How many KB is a 128×128 image?
Estimated from encodes of real sample images measured with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026, interpolated to 16,384 pixels. The outdoor photo at 128×128 is about 4.9 KB at quality 75 and a scanned page about 2.9 KB; your file will differ with detail and noise.
| Image type | JPEG q60 | JPEG q75 | JPEG q90 | WebP q75 | PNG |
|---|---|---|---|---|---|
| Portrait photo | ≈ 3.8 KB | ≈ 4.8 KB | ≈ 7.4 KB | ≈ 4 KB | ≈ 30.6 KB |
| Outdoor photo | ≈ 3.7 KB | ≈ 4.9 KB | ≈ 7.7 KB | ≈ 4.2 KB | ≈ 32.8 KB |
| Scanned document | ≈ 2.2 KB | ≈ 2.9 KB | ≈ 5 KB | ≈ 2.1 KB | ≈ 24.7 KB |
| Flat graphic or logo | ≈ 2.2 KB | ≈ 2.8 KB | ≈ 4.2 KB | ≈ 1.8 KB | ≈ 4.8 KB |
Will a 128×128 photo fit an upload limit?
The highest JPEG or WebP quality that stays under each limit at exactly 128×128 px, from the same measurements. Set the KB limit next to the pixel size and PixelFit runs this search on your own photo.
| Limit | Portrait, JPEG | Outdoor photo, JPEG | Outdoor photo, WebP |
|---|---|---|---|
| Under 10 KB | up to quality 94 | up to quality 94 | fits at quality 95 |
| Under 20 KB | fits at quality 95 | fits at quality 95 | fits at quality 95 |
| Under 30 KB | fits at quality 95 | fits at quality 95 | fits at quality 95 |
128×128 on high-density screens
A screen with a device pixel ratio of 2 draws every CSS pixel with 2×2 device pixels, so an icon shown at 128 CSS px needs a file of 256×256 there. Read the other way, this file is the 2× version of a 64×64 slot.
| Device pixel ratio | 128×128 is sharp up to | File needed for a 128 CSS px slot |
|---|---|---|
| 1× | 128×128 CSS px | 128×128 px |
| 1.5× | 85.3×85.3 CSS px | 192×192 px |
| 2× | 64×64 CSS px | 256×256 px |
| 3× | 42.7×42.7 CSS px | 384×384 px |
| 4× | 32×32 CSS px | 512×512 px |
Shrinking a master icon to 128×128
Icons are best drawn large and reduced. PixelFit halves the master while both sides stay at or above 128 px, then makes one last step to 128×128; each pass blends neighbouring pixels, which keeps thin strokes from breaking up.
| Master | Reduction | Passes PixelFit runs |
|---|---|---|
| 1024×1024 | 0.13× (8 times smaller) | 3: 512×512 → 256×256 → 128×128 |
| 512×512 | 0.25× (4 times smaller) | 2: 256×256 → 128×128 |
| 256×256 | 0.5× (2 times smaller) | 1: 128×128 |
Making a 128×128 icon
From a 512×512 master icon the reduction is 0.25×, small enough that the artwork usually survives without redrawing. Save icons as PNG to keep transparency and crisp edges; a flat graphic at 128×128 is about 4.8 KB as PNG, against 4.9 KB for a detailed outdoor photo as JPEG at quality 75.
A 128×128 icon is 2.7 times the 48 px edge that Google Search recommends exceeding for favicons, so it can double as the high-resolution favicon.
Other 1:1 sizes
These targets share the exact 1:1 ratio of 128×128, so resizing between them is a pure scale with nothing cropped.
| Size | Scale from 128×128 | Megapixels |
|---|---|---|
| 144×144 app icon | 1.13× | 0.0207 MP |
| 150×150 square | 1.17× | 0.0225 MP |
| 152×152 touch icon | 1.19× | 0.0231 MP |
| 100×100 square | 0.78× | 0.01 MP |
| 167×167 touch icon | 1.3× | 0.0279 MP |
| 96×96 icon | 0.75× | 0.0092 MP |
| 180×180 apple-touch-icon | 1.41× | 0.0324 MP |
| 192×192 PWA icon | 1.5× | 0.0369 MP |
How to resize a picture to 128×128
-
Add the picture
Drop, paste or pick the photo in the PixelFit panel at the top of this page; it is decoded in your browser and never uploaded.
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Set the size
Enter 128 as the width and 128 as the height in pixels (the panel is already set to 128×128).
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Choose how it fits
Choose crop to fill to keep the 1:1 frame without stretching (a phone photo loses 25%, left and right cut). Fit inside keeps the whole picture as a 128×96 file instead; Pad with colour puts that on a full 128×128 canvas.
-
Pick the format and download
Choose PNG for an icon, then download the 128x128 file.
Sources
- Define your app icons, MDN Web Docs, checked 31 October 2026: developer.mozilla.org/en-US/docs/Web/Progressive_web_apps…
- Measured by PixelFit with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026, from the sample photo Hartz Lake at Hartz Mountain.jpg by JustinH (Wikimedia Commons user) (CC0 1.0): commons.wikimedia.org/wiki/File:Hartz_Lake_at_Hartz_Mount…
Frequently asked questions
How do I resize an image to 128x128?
Open the image in the PixelFit panel on this page, set 128 × 128 px, choose crop to fill so nothing is stretched and download. From a 12 MP phone photo that crops 25% (left and right cut) and scales the rest by 0.042×.
What aspect ratio is 128x128?
128x128 has an aspect ratio of 1:1: square, width ÷ height = 1. Sizes with the same ratio include 144×144 app icon, 150×150 square and 152×152 touch icon.
Which other icon sizes go with 128x128?
For a 128 CSS px slot, a 2× screen needs 256×256 and a 3× phone 384×384. 128x128 is already above the 48×48 px that Google Search recommends exceeding for favicons.
How big is a 128x128 JPEG file?
For a detailed outdoor photo about 4.9 KB at quality 75 (3.7 KB at 60, 7.7 KB at 90, 6.4 KB at the panel's default quality 85); a head-and-shoulders portrait is about 4.8 KB at quality 75, estimated from measured encodes. A flat graphic is smaller, a noisy low-light photo larger.