Image Resizer
Upload an image and easily resize it to any width, height, or file size you need.
Selected File:
✨ Result
How to Resize an Image
Adjust your image dimensions or compress it to a specific file size — all in your browser with no software required.
-
Upload Your Image
Click the upload area or drag and drop your image file onto it. The tool accepts all common image formats including JPG, PNG, GIF, BMP, and WebP. Once uploaded, a preview of your image appears along with its filename so you can confirm the correct file is loaded before making any changes.
-
Enter Your Target Dimensions
Type your desired width and/or height in pixels in the respective input fields. You can fill in just one dimension and leave the other as Auto — the tool will calculate the missing value automatically to maintain the original aspect ratio and avoid distortion. If you enter both width and height, the image will be resized to exactly those dimensions regardless of aspect ratio.
-
Set a Target File Size
Enter your desired output file size in kilobytes (KB) in the Target File Size field. The tool will compress the image to reach or stay below this size. This is especially useful when you need to meet upload limits on forms, portals, or apps that restrict file size — for example, a visa application requiring photos under 200 KB, or a job portal that caps profile pictures at 100 KB.
-
Click "Resize and Compress"
Once your settings are entered, click the Resize and Compress button to process the image. The operation runs entirely within your browser — your image is never sent to any external server. After processing, the result section displays the output file size, final width, and final height so you can verify everything is as expected.
-
Download Your Resized Image
A preview of the resized image appears in the result section. Click the Download Image button to save it directly to your device. The downloaded file is ready to use immediately — for uploading to a website, attaching to a form, sharing on social media, or any other purpose.
💡 Pro Tips
- Leave one dimension blank (Auto) whenever possible — this preserves the aspect ratio and prevents your image from looking stretched or squished.
- If you only need to reduce file size without changing dimensions, leave Width and Height blank and just set the Target File Size.
- For profile pictures on most platforms (LinkedIn, Twitter, Facebook), a width of 400–800 px and a file size under 200 KB covers virtually all requirements.
- Passport and visa photo portals typically require images between 100–300 KB at specific dimensions — check the portal's requirements first, then use those exact values here.
- PNG images with transparent backgrounds will lose their transparency when compressed to a target file size, as the output format may switch to JPEG. Use PNG-only tools if transparency must be preserved.
Understanding the Three Input Controls
Width, Height, and Target File Size can be used independently or together — here's how each one behaves.
Set Output Width
Defines the horizontal pixel count of the output image. If Height is left blank, the height is calculated automatically to match the original aspect ratio. Enter a width smaller than the original to downscale, or larger to upscale (though upscaling reduces sharpness).
e.g. Width: 800 / Height: AutoSet Output Height
Defines the vertical pixel count. Works symmetrically with Width. Setting only the height while leaving width blank preserves the aspect ratio. Entering both width and height forces exact dimensions without ratio correction.
e.g. Width: Auto / Height: 600Compress to File Size
The tool adjusts compression quality iteratively until the output file reaches your target size or below. This can be used alone (without resizing dimensions) purely to reduce file weight, or in combination with dimension changes for full control over both size and quality.
e.g. Target: 150 KBCommon Image Size Requirements
A quick reference for the most frequently needed image dimensions and file sizes across popular platforms and use cases.
| Platform / Use Case | Recommended Dimensions | Max File Size | Notes |
|---|---|---|---|
| Passport / Visa Photo | 600 × 600 px or as specified |
200–300 KB | Always check the issuing authority's exact specs — dimensions and KB limits vary by country |
| LinkedIn Profile Picture | 400 × 400 px minimum |
8 MB | Square crop; higher resolution recommended for retina displays |
| Instagram Post | 1080 × 1080 px (square) |
30 MB | Also supports 1080×1350 (portrait) and 1080×566 (landscape) |
| Facebook Profile Photo | 170 × 170 px displayed |
— | Upload at 720×720 or higher for best quality; Facebook downscales automatically |
| Website / Blog Image | 1200 × 630 px (OG standard) |
Under 200 KB | Keeping images under 150–200 KB is critical for fast page load times |
| Email Signature Logo | 200–300 px wide |
Under 50 KB | Small file size is important so emails don't trigger spam filters or load slowly |
| WhatsApp / Telegram | Any | 16 MB (WhatsApp) | Platforms recompress images anyway — resize first if you want to control the quality |
| Online Job / Visa Application Portal | Varies (typically 200–400 px) | 50–500 KB | Portals vary widely — read the specific instructions on the portal before uploading |
Common Use Cases
Image resizing comes up in dozens of everyday digital tasks across personal and professional contexts.
Passport & ID Photos
Resize and compress a phone photo to meet the precise pixel dimensions and KB limits required by government portals, embassies, and visa application forms.
Website Performance
Oversized images are the leading cause of slow web pages. Resize photos to the exact display width and compress them under 150 KB before uploading to your CMS.
Professional Profiles
Prepare a clean, correctly proportioned profile photo for LinkedIn, job boards, or company directories — most platforms display photos as squares at 400×400 px or smaller.
Email Attachments
Reduce large photos to a fraction of their original size before attaching them to emails, keeping messages light and reducing the chance of bouncing due to size limits.
E-Commerce Product Images
Resize product photographs to a consistent square format and compress them for fast loading on online stores, marketplaces, or auction listings.
Form & Document Uploads
Many government, banking, and HR portals accept profile photos and supporting images only within strict KB limits — resize and compress to meet them instantly.
Frequently Asked Questions
Everything you need to know about resizing and compressing images with this tool.
-
No. All image resizing and compression happens entirely within your browser using the HTML5 Canvas API. Your image is never transmitted to any external server, stored remotely, or shared with third parties. This makes the tool completely safe for sensitive images such as ID photos, medical documents, passport scans, or private personal photographs. Closing or refreshing the browser tab removes all trace of the image from memory.
-
If you enter both a width and a height, the image is resized to exactly those pixel dimensions. If your entered values have a different aspect ratio than the original image, the image will be stretched or squished to fit. To avoid this, enter only one dimension and leave the other as Auto — the tool will calculate the second dimension to maintain the original proportions. For example, if your image is 1200×800 and you enter only Width: 600, the height will automatically become 400, preserving the 3:2 ratio perfectly.
-
Yes. Simply leave both the Width and Height fields blank and only enter a Target File Size in KB. The tool will compress the image at its original dimensions until it reaches your target size. This is useful when a platform requires a specific maximum file size but does not impose dimension restrictions — for example, some form portals accept images up to 200 KB at any resolution.
-
The tool uses an iterative compression algorithm to get as close as possible to your target without exceeding it. In most cases the output will be at or slightly below the target value. Very small targets (under 10–20 KB) may result in noticeably reduced image quality, as significant compression is needed to reach such small sizes. For very large images being compressed to very small targets, the tool may need several iterations, which can take a second or two longer than usual.
-
You can upload images in JPG, PNG, GIF, BMP, WebP, and most other formats your browser supports. The output image is typically delivered as a JPEG, which provides the best balance of quality and file size for most use cases. If you need to preserve transparency (such as in a PNG with a transparent background), be aware that converting to JPEG will fill transparent areas with a white background. For PNG output with transparency, a dedicated image editor may be more suitable.
-
No. Upscaling — increasing the dimensions beyond the original size — does not add real detail or improve quality. It simply stretches the existing pixels across a larger canvas, which typically results in a blurry or pixelated appearance. For genuinely sharper upscaling, AI-based super-resolution tools are required, which use machine learning to intelligently fill in missing detail. This tool is best used for downscaling (making images smaller) or resizing to specific required dimensions within the original resolution range.
-
First, check the exact requirements on the application portal — most specify both pixel dimensions (commonly 600×600 px or 413×531 px) and a maximum file size (commonly 100–300 KB). Then upload your photo here, enter the required width and height in the respective fields, and set the target file size to the maximum allowed value (e.g. 200). Click Resize and Compress, verify the result matches the specifications, and download. Make sure the photo itself meets content requirements (white background, neutral expression, no glasses) before resizing, as this tool only adjusts dimensions and file size, not the photo's content.
-
Yes. The tool runs in any modern mobile browser on iOS and Android. You can upload images directly from your camera roll, downloads folder, or cloud storage apps. On mobile, you can also take a new photo and upload it immediately — useful for quickly resizing a just-taken ID photo or document scan. Processing is slightly slower on older mobile hardware for very large images, but the output quality is identical to desktop use.
-
Currently the tool processes one image at a time. For a single image at a time, this is the quickest and simplest approach — upload, set your values, download, then upload the next image. If you regularly need to batch resize large numbers of images, dedicated desktop software or command-line tools like ImageMagick may better suit that workflow. For most everyday use cases — resizing a profile photo, preparing a form upload, or compressing a website image — one at a time is sufficient.
-
The tool is completely free with no account, sign-up, or payment required. No watermarks, logos, or overlays of any kind are added to the output image. The downloaded file contains only your original image, resized and compressed to your specifications — nothing else is inserted or modified. There are no usage caps or premium tiers; all features are available to everyone at no cost.