Resize Image Pixels, Change Width and Height to Any Size

Upload your photo and change pixel dimensions to exactly what your portal, platform, or print studio asks for. Resize image pixels for exam portals, Instagram, YouTube thumbnails, passport photos, and more. JPG, PNG, and WebP all work. Aspect ratio locks by default. Everything runs in your browser, nothing gets sent to a server.

Most portals reject photos because the pixel count is wrong, not because the photo looks bad. A perfectly clear face still fails if the width is 400 when the form wants 200. Getting the dimensions right is the only fix.

How to Resize an Image by Pixels

Four steps, nothing to configure beyond your target dimensions.

Step 1. Upload your image

Click the upload zone or drag your file in. JPG, PNG, and WebP files work up to 25 MB. The image preview appears inside the zone immediately. Original width, height in pixels, and file size all show below the preview.

Step 2. Set your target pixel dimensions

Type the width and height you need, or click a preset chip. Aspect ratio is locked by default. Changing width auto-calculates the correct height so the image never stretches. The scale badge updates instantly to show whether you are shrinking or enlarging.

For exam portals, select the matching preset (200×230, 280×340, 413×531, and others are built in). For social media, use 1080×1080 for Instagram square or 1280×720 for YouTube thumbnails.

Step 3. Choose your output format

• JPG for photos, smaller file size, no transparency support
• PNG for logos, graphics, and images with transparent backgrounds
• WebP for web use, smallest file size at similar visual quality

Step 4. Resize and download

Click Resize Image. The before and after comparison shows original versus resized dimensions side by side. The file downloads with dimensions in the filename, for example photo-1080×1080.jpg, so you always know what you downloaded.

Resize Image Pixels, Common Size Reference

Every platform and portal has a different requirement. This section covers the most common ones so you do not have to hunt through notification PDFs.

Indian Government Exam Photo Pixel Sizes

Photos:

Exam	Width x Height	File Size	Format
IBPS PO / Clerk	200×230 px	20–50 KB	JPG
SBI PO / Clerk	200×230 px	20–50 KB	JPG
RBI Grade B / Assistant	200×230 px	20–50 KB	JPG
SSC CGL / CHSL / MTS	280×340 px	20–50 KB	JPG
RRB NTPC / Group D	200×230 px	20–40 KB	JPG
UPSC OTR Portal	350–1000 px (any side)	20–300 KB	JPG
India Post GDS	320×400 px	30–100 KB	JPG
EPFO SSA	320×400 px	10–200 KB	JPG
JEE Main / NEET	200×230 px	10–200 KB	JPG
India Passport (standard)	413×531 px	under 300 KB	JPG
Indian Passport (online)	600×600 px	under 100 KB	JPG

Signatures:

Exam	Width x Height	File Size
SSC CGL / CHSL	140×60 px	10–20 KB
India Post GDS	300×120 px	20–100 KB
UPSC	350–500 px wide	20–100 KB
IBPS / SBI	140×60 px	10–20 KB

Pixel dimensions and file size in KB are two separate requirements. This tool handles pixel dimensions. Once resized, run the output through the KB compressor for the file size step.

Social Media Platform Pixel Sizes

Instagram:

• Square post: 1080×1080 px
• Portrait post: 1080×1350 px
• Landscape post: 1080×566 px
• Stories and Reels: 1080×1920 px (9:16 ratio)

YouTube:

• Thumbnail: 1280×720 px (16:9, under 2 MB)
• Channel banner: 2560×1440 px (safe zone 1546×423 px)

Facebook:

• Cover photo: 820×312 px desktop, upload at 820×462 px for both views
• Shared image: 1200×630 px

Other platforms:

• LinkedIn post: 1200×627 px
• WhatsApp DP: 192×192 px minimum, 640×640 px ideal
• Pinterest pin: 1000×1500 px (2:3 ratio)
• Twitter / X post: 1200×675 px
• Profile avatar / icon: 300×300 px

Web and Print Pixel Sizes

• Standard web image: 800×600 px
• Full HD desktop wallpaper: 1920×1080 px
• Thumbnail or icon: 100×100 px
• Small product image: 300×300 px
• Passport photo at 300 DPI for print studios: 413×531 px

What Pixel Resizing Actually Does

An image is a grid of tiny colored squares. Each square is one pixel. Width and height in pixels define how large the image appears on screen and how much detail it holds.

A photo from a modern phone is around 4032×3024 pixels. That is 12 megapixels. The IBPS portal wants 200×230 pixels. The tool scales the grid down from 4032 wide to 200 wide, recalculating every row and column in the process.

Pixel count and file size in KB are related but not the same thing. A 200×230 pixel image can still be 500 KB if saved without compression. A 4000×3000 pixel image can be 200 KB if compressed heavily. Changing pixel dimensions is one operation. Changing KB size is another.

Pixels, KB, DPI, and Inches, What Each One Means

• Pixels (px): The unit portals and social media platforms use. Width times height. What this tool changes.
• Kilobytes (KB): File weight. What upload size limits refer to. Changed through compression, not pixel resizing.
• DPI (dots per inch): A print measurement. 300 DPI for print quality, 72 DPI for screen. Has no effect on what you see on a monitor.
• Inches / cm / mm: Physical print dimensions. Convert to pixels using DPI.

DPI to pixels formula:

Pixels = size in inches x DPI

• 3.5 cm at 300 DPI = 1.378 inches x 300 = 413 px (passport photo width)
• 4.5 cm at 300 DPI = 1.772 inches x 300 = 531 px (passport photo height)
• 2 inches at 300 DPI = 600 px (US Visa, Indian Passport online)

This is why the 413×531 px preset matches the India Standard 3.5×4.5 cm passport photo at 300 DPI. The numbers are the same thing expressed differently.

Screen Resolution vs Image Resolution

Screen resolution is how many pixels your display has, for example 1920×1080 on a full HD monitor. Image resolution is how many pixels the image file contains.

If your image is larger than the screen, the browser scales it down to fit. If your image is smaller, it displays at its actual size or stretches to fill the container. For web use, match the image pixel dimensions to the space it will occupy on the page. Uploading a 4000×3000 image for a 400×300 slot wastes file size and slows the page down.

Writing all remaining sections at once.

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Aspect Ratio Lock, When to Use It and When to Turn It Off

Aspect ratio is the proportional relationship between width and height. A 200×230 pixel image has a ratio of roughly 0.87:1. A 1080×1080 image is exactly 1:1 (square). A 1920×1080 image is 16:9 (widescreen).

Locking the ratio means changing one dimension automatically adjusts the other. The image keeps its original proportions and never looks squished or stretched.

When to Keep Aspect Ratio Locked

Keep it locked for most everyday resizing tasks.

• Resizing a photo for social media where exact pixel dimensions are flexible
• Profile pictures, avatars, and product images where distortion is visible
• Any situation where you are scaling down for general web or email use
• Blog images, banners, and thumbnails where proportions matter visually

When to Unlock Aspect Ratio

Unlock it when a portal specifies both width and height independently, and those numbers do not match your image’s natural ratio.

• Your portrait photo is 3:4 but the portal wants 200×230 (slightly different ratio)
• Government exam portals often define exact pixel values for both dimensions
• Signature images have very different width-to-height ratios than photos
• In these cases, unlock, type both values manually, and check the preview for distortion

The preview inside the download comparison shows you exactly what the resized image looks like before you save it.

How to Resize Image Pixels Without Losing Quality

Quality after resizing depends on two things: the direction you are scaling and the format you save to.

Downscaling, Shrinking to Smaller Pixels

Downscaling almost always looks clean. The tool averages neighboring pixels together using high-quality interpolation, which produces smooth edges and readable text.

• Always start from the highest resolution original you have
• Never downscale a file that has already been compressed and saved multiple times
• Every JPEG re-save removes information that cannot be recovered
• A studio photo at 5 MB compresses to 200×230 pixels cleanly, a WhatsApp forward at 80 KB may not

Upscaling, Making an Image Larger in Pixels

Upscaling means creating pixels that did not exist in the original. The tool fills them by interpolating from surrounding pixels, which works for modest increases.

• Going from 400×460 to 800×920 (2x) looks acceptable for most uses
• Going from 200×230 to 1920×1080 creates visible blurriness and pixelation
• For significant enlargement, an AI upscaler produces better results than standard interpolation
• If someone asks how to resize an image in large size without pixelation, the honest answer is: start with a larger original

PNG vs JPG After Resizing

The format you save to after resizing affects quality independently of the pixel dimensions.

• PNG is lossless. Resize a PNG and save as PNG, and there are no compression artifacts.
• JPG loses a small amount of quality every time it is saved. The first save from a raw or uncompressed source is fine. Re-saving a previously compressed JPG degrades it further.
• If you need to resize and then edit again later, save as PNG to preserve all the data.
• If the portal requires JPG and file size matters, the tool defaults to 0.92 quality, which is the optimal point between size and clarity.

Resize Image Pixels for Specific Use Cases

How to Resize a Signature in Pixels

Signature images have different pixel requirements than photos, and most people treat them the same way, which causes rejection.

• SSC CGL and CHSL signature: 140×60 pixels
• India Post GDS signature: 300×120 pixels
• UPSC signature: 350 to 500 pixels wide, between 20 and 100 KB
• IBPS and SBI signature: 140×60 pixels

Sign on plain white paper with black ink. Photograph or scan under even light with no shadows. Crop tightly around the signature before uploading. A signature with large white borders around it wastes pixels and produces a harder to read output at small dimensions.

Unlock aspect ratio before entering signature dimensions. Signature width-to-height ratios are very different from standard photo proportions.

Resizing Photos for Print, DPI and Pixels Together

Print size in centimetres or inches does not tell you the pixel dimensions unless you know the DPI.

• 300 DPI is the standard for sharp print output
• A 4×6 inch print at 300 DPI needs 1200×1800 pixels
• A passport photo at 3.5×4.5 cm at 300 DPI needs 413×531 pixels
• A 35mm x 45mm passport photo at 300 DPI also equals 413×531 pixels (same thing, different units)

Use the 413×531 preset for passport photos you plan to print at a studio. The output will be print-ready at the correct physical size.

For online portals that just specify pixels with no mention of DPI, ignore DPI entirely. Enter the pixel values and resize. DPI only matters when the final output goes to a physical printer.

Resizing Multiple Photos to the Same Pixel Size

Exam applications often require the same pixel dimensions across all uploaded documents. Resize each file separately, using the correct preset for each document type.

• Photo and signature have different pixel requirements, handle them separately
• Download each resized file before uploading the next
• Check the filename after download, it includes the pixel dimensions so you can confirm at a glance

Resize Image in Pixels and KB Together

Many portals specify both pixel dimensions and file size. These are two separate requirements handled by two separate operations.

The correct order:

1. Resize to the required pixel dimensions first using this tool
2. Download the resized image
3. Run it through the KB compressor to hit the required file size
4. Upload the final file to the portal

Do not compress to KB first and then resize. Resizing a compressed file can push the file size back up, and then you are compressing again, losing quality twice.

Common combined requirements:

Exam	Pixels	File Size	Format
IBPS PO	200×230 px	20–50 KB	JPG
SSC CGL	280×340 px	20–50 KB	JPG
UPSC Civil Services	350–1000 px	20–300 KB	JPG
India Post GDS	320×400 px	30–100 KB	JPG
JEE Main	200×230 px	10–200 KB	JPG
NEET UG	200×230 px	10–200 KB	JPG

After resizing here, use the right compressor for your target:

• Compress to 50KB for IBPS, SBI, SSC
• Compress to 100KB for JEE, NEET, CAT, Passport
• Reduce image size in KB for any custom target

Common Mistakes When Resizing Image Pixels

These are the mistakes that cause portal rejections even after resizing.

• Compressing to KB before resizing to pixels. Always resize first. Compression after preserves the correct dimensions.
• Resizing with aspect ratio unlocked accidentally. The face or signature stretches and looks wrong. Check the preview before downloading.
• Starting from a WhatsApp forward or screenshot. These files have already been compressed. Start from the original camera file.
• Confusing DPI with pixels for portal uploads. Portals ask for pixels. DPI only applies to print. Ignore DPI for digital uploads.
• Using the same dimensions for photo and signature. They are different. SSC photo is 280×340. SSC signature is 140×60.
• Upscaling a low-resolution original significantly. A 100×100 image cannot be enlarged to 1000×1000 without visible blurring. Start from a larger original.
• Uploading PNG to a JPG-only portal after resizing. Always check the format selector before clicking resize.

Frequently Asked Questions

Final Thoughts

Getting pixel dimensions right is the step most people skip. They compress the file size, check the format, and then wonder why the portal still rejects the upload. The resize image pixels step comes first, before compression, before format conversion, before anything else.

Select your target from the presets, upload, download, then handle the KB requirement separately. That two-step workflow covers every government portal, exam form, and social media platform size this page lists.

Related Tools

• Compress Image to 50KB, for IBPS, SBI, SSC portals
• Compress Image to 100KB, for JEE, NEET, Passport
• Reduce Image Size in KB, any custom KB target
• JPG to KB Converter, compress JPG to exact KB
• Passport Size Photo Maker, auto-size with background
• Compress Image to 20KB, for signatures and Aadhaar
• KB to MB Converter, instant unit conversion