⚙ Settings
📐 Preset Sizes
One click fills in the unit, the DPI and the measurements. Document and print sizes are applied as exact dimensions.
Select your images
Click or drag them in. JPG, PNG and WEBP accepted — up to 10 photos at a time.
Pick a unit and size
Use px, inches, cm, mm or %. For physical measurements, set the DPI as well.
Download the ZIP
Hit resize and every image comes back in one ZIP file.
📏 Resize an Image in Inches or CM
People who need to resize an image in inches are usually preparing a file for print: a passport photo, a business card, a name badge, a flyer or a full sheet of Letter paper. The catch is that digital files do not store inches — they store pixels. DPI (dots per inch) is the bridge between the two.
With this tool you click the inch unit, type your width and height, set the DPI, and the conversion happens automatically. The pixel result appears right under each field before you download anything. Ask for 2 × 2 inches at 300 DPI and you get a 600 × 600 pixel file — exactly what a passport application expects.
The formula behind the conversion
- Pixels = inches × DPI
- Pixels = centimeters ÷ 2.54 × DPI
- Pixels = millimeters ÷ 25.4 × DPI
The 2.54 shows up because one inch equals 2.54 centimeters. So at 300 DPI, every centimeter becomes roughly 118 pixels.
📏 What is DPI and why does it matter?
DPI stands for dots per inch — the pixel density of an image. The higher the DPI, the more detail per inch, and the larger the final file.
72 and 96 DPI — Web and Screens
The standard for images that will only ever be seen on a monitor, a website or a phone. Files stay small and load fast. 96 DPI is the Windows default; 72 DPI comes from older displays and is still requested by some forms.
300 DPI — Professional Printing
The standard for print shops and photo labs. Required for passport photos, business cards, invitations and any printed material. The file gets considerably bigger, but that is what keeps it sharp on paper.
A quick example: a 4 × 6 inch photo at 72 DPI is only 288 × 432 px. The same photo at 300 DPI is 1200 × 1800 px — ready to print.
🔢 Inches to Pixels Conversion Table
Use this as a quick reference before you resize your photo online. Values are rounded to the nearest pixel.
| Size | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|
| 1 in | 72 px | 96 px | 150 px | 300 px |
| 2 in (passport) | 144 px | 192 px | 300 px | 600 px |
| 3 in | 216 px | 288 px | 450 px | 900 px |
| 4 in | 288 px | 384 px | 600 px | 1200 px |
| 5 in | 360 px | 480 px | 750 px | 1500 px |
| 6 in | 432 px | 576 px | 900 px | 1800 px |
| 7 in | 504 px | 672 px | 1050 px | 2100 px |
| 8 in | 576 px | 768 px | 1200 px | 2400 px |
| 8.5 in (Letter width) | 612 px | 816 px | 1275 px | 2550 px |
| 11 in (Letter height) | 792 px | 1056 px | 1650 px | 3300 px |
🔢 Centimeters to Pixels Conversion Table
Working in metric instead? Here are the same conversions for resizing an image in cm.
| Size | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|
| 1 cm | 28 px | 38 px | 59 px | 118 px |
| 2 cm | 57 px | 76 px | 118 px | 236 px |
| 5 cm | 142 px | 189 px | 295 px | 591 px |
| 10 cm | 283 px | 378 px | 591 px | 1181 px |
| 15 cm | 425 px | 567 px | 886 px | 1772 px |
| 21 cm (A4 width) | 595 px | 794 px | 1240 px | 2480 px |
| 29.7 cm (A4 height) | 842 px | 1123 px | 1754 px | 3508 px |
📊 Resize an Image by Percentage
When your batch contains photos of different sizes, a fixed width is the wrong approach. Click the % unit instead: each image is scaled from its own original dimensions, keeping every aspect ratio intact.
- 50% — halves the photo, great for taming heavy camera files
- 25% — thumbnails and previews
- 75% — a light trim with almost no visible loss
- 200% — doubles the dimensions (use sparingly, upscaling softens detail)
📱 Recommended Social Media Sizes
If you are here to resize an image for Instagram, YouTube or LinkedIn, the shortcuts above fill everything in with one click. These are the sizes to aim for:
| Where it goes | Size | Ratio |
|---|---|---|
| Instagram — square post | 1080 × 1080 px | 1:1 |
| Instagram — portrait post | 1080 × 1350 px | 4:5 |
| Instagram Stories and Reels | 1080 × 1920 px | 9:16 |
| WhatsApp — profile photo | 640 × 640 px | 1:1 |
| Facebook — post | 1200 × 630 px | 1.91:1 |
| Facebook — cover | 1640 × 624 px | 2.63:1 |
| YouTube — video thumbnail | 1280 × 720 px | 16:9 |
| LinkedIn — profile cover | 1584 × 396 px | 4:1 |
🖼️ How to Resize Without Losing Quality
The most common worry about any online image resizer is whether the result will come out blurry. A few practical rules:
- Scaling down is safe, scaling up is not. Shrinking discards pixels and stays sharp. Enlarging well beyond the original forces the software to invent detail that was never captured.
- Leave the ratio locked. With the aspect ratio toggle on, your image fits inside the requested size without stretching or squashing.
- Pick the right format. JPG for photographs, PNG when you need transparency, WEBP when the smallest possible web file is the goal.
- Be gentle with the quality slider. Between 85% and 95% the difference is hard to see, but the file gets noticeably lighter.
- Always start from the original. Resizing a file that was already resized compounds the losses.
🔒 Complete Privacy: Nothing Leaves Your Device
Your images are processed inside your own browser using the HTML5 Canvas API. No file is uploaded to a server, nothing is stored, and nothing needs to be deleted afterwards. Close the tab and it is gone from memory — which makes this safe even for ID documents and family photos.
⚡ Fast, No Sign-Up, 100% Free
- Five units: pixels, inches, centimeters, millimeters and percentage
- Automatic conversion when you switch units — your value is converted, not wiped
- DPI control at 72, 96, 150 and 300 dots per inch
- Aspect ratio preserved image by image, even in mixed batches
- Ready-made presets for passport photos, Letter, A4, Instagram and YouTube
- Up to 10 images per batch, delivered in a single ZIP
- Output as JPG, PNG or WEBP with adjustable quality
- No watermark, no account, no usage limit
❓ Frequently Asked Questions
How do I resize an image in inches?
Upload your photo, click the inch unit in the settings panel, type the width and height, and choose a DPI. Use 300 DPI for print and 96 DPI for screens. The pixel equivalent appears under each field before you download.
How many pixels is 1 inch?
It depends on the DPI — the term literally means dots per inch. At 300 DPI, 1 inch is 300 pixels. At 150 DPI it is 150 pixels, at 96 DPI it is 96 pixels and at 72 DPI it is 72 pixels.
How many pixels is 1 cm?
At 300 DPI, 1 cm is roughly 118 pixels. At 150 DPI about 59 pixels, at 96 DPI about 38 pixels and at 72 DPI about 28 pixels.
The formula is: pixels = centimeters ÷ 2.54 × DPI.
Which DPI should I use when resizing a photo?
Use 300 DPI for anything headed to a printer — passport photos, business cards, flyers. Use 96 DPI for screen-only images, websites and social media. 72 DPI is an older screen standard that some official forms still ask for.
How do I resize an image by percentage?
Click the % unit and enter a value. 50% halves the photo, 200% doubles it. Each image is scaled from its own original size, which is exactly what you want for batches with mixed dimensions.
How do I make a 2x2 passport photo?
Click the Passport 2×2 in shortcut, or set it manually: inches as the unit, 2 for width, 2 for height, 300 DPI. That gives you a 600 × 600 pixel image, the size required for a US passport photo.
Does resizing reduce image quality?
Scaling down keeps things sharp, since the software just drops surplus pixels. Scaling far above the original is what causes softness — there is no new detail to create. Keeping the ratio locked also prevents stretching.
Are my images uploaded to a server?
No. Everything runs inside your browser. No file leaves your computer or phone and nothing is stored anywhere. If you also want to strip the hidden data inside a photo, try our metadata remover.
How many images can I resize at once?
Up to 10 per batch. They are processed one after another and delivered together in a single ZIP file.
Does it work on mobile?
Yes. The tool is fully responsive and runs in the browser on Android and iPhone, with no app to install. The ZIP lands in your device's downloads folder.
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