Compare before and after
Use the Original and Result control above the preview to check framing, sharpness, transparency, and color before saving.
Resize and compress images online.
Set exact dimensions, crop or fit the image, and measure the real JPG, PNG, or WebP result before downloading.
Open image toolImage tool
Resize, crop, and export
Choose one image, adjust the settings, then inspect the result.
Start with where the image will be used
Choosing the destination first prevents accidental stretching and avoids exporting more pixels than the upload needs.
Square upload1024 x 1024Profiles, product tiles, forms
YouTube thumbnail1280 x 72016:9 with a visible safe area
Vertical social image1080 x 1350 or 1080 x 1920Posts, stories, and reels
Smaller fileTarget KB or qualityEmail, websites, upload limits
Need a different size? Enter exact dimensions in the tool and keep aspect ratio enabled unless distortion is intentional.
A result you can verify
The preview is generated from your chosen settings
FitMyPic does not display a generic savings claim. It renders the selected image in your browser, encodes the chosen format, and reports the resulting dimensions and file size.
Measure the encoded file
The output size is calculated from the actual JPG, PNG, or WebP blob created by the browser, not from a fixed estimate.
Understand the tradeoff
A smaller result can mean fewer pixels, stronger compression, or both. The comparison helps you decide whether the savings are worth the visual change.
Built and reviewed by FitMyPic for browser-based image preparation.
Testing method
About the site
Last workflow review: August 8, 2026
Workflow
How to resize or compress an image
Use FitMyPic for everyday image cleanup before uploading to social media, stores, forms, or websites.
1. Select an image
Choose a JPG, PNG, or WebP file from your device. The file is opened in your browser for normal resizing and compression.
2. Set size and format
Enter a custom width and height, keep the aspect ratio locked, or use a common preset such as 1024 x 1024 or YouTube thumbnail.
3. Download the result
Export the optimized image as JPG, PNG, or WebP. Lower quality settings can reduce file size when the output format supports compression.
Formats and privacy
Supported image options
These notes help you decide whether the tool fits the file you are preparing.
- Input formats
- JPG, PNG, and WebP images.
- Output formats
- JPG, PNG, and WebP, depending on browser support.
- Best uses
- Profile images, thumbnails, product previews, blog images, and upload-ready square graphics.
- Privacy model
- Normal processing happens in your browser, without sending selected image files to a conversion server.
- File size guidance
- Large camera photos may use more memory. For smoother browser performance, resize very large files in smaller batches.
- Target size
- For JPG and WebP exports, FitMyPic can try several quality levels to download a file close to a target KB size.
Choose deliberately
Which output should you use?
The best format depends on what the image contains and where it will be used.
OutputBest forWatch for
JPGPhotos, marketplace uploads, email attachmentsNo transparency; repeated compression can soften detail
PNGLogos, screenshots, interface graphics, transparencyPhoto files can be much larger
WebPModern websites and smaller web deliverySome older apps and upload forms may reject it
Three controls shape the final file
File size is not controlled by one magic slider. Dimensions, format, and encoding quality each change a different part of the result.
Dimensions set the pixel budget
Reducing width and height removes pixels. This is usually the strongest way to shrink a large camera image before an online upload.
See the quality checklistFormat decides what can be preserved
JPG suits photos, PNG preserves transparency and sharp graphics, and WebP is useful when modern web delivery matters.
Compare file-size factorsQuality balances detail and bytes
For JPG and WebP, lower quality can reduce the encoded file. Inspect edges, text, and faces in the real preview before downloading.
Review the output testsGuides
Image sizing guides
How to resize an image online
Learn the basic workflow for changing image width, height, aspect ratio, and output format.
How image compression works
Understand quality settings, file size, and when to use JPG, PNG, or WebP for smaller images.
Resize images for Instagram
Use square, portrait, and story sizes that fit common Instagram posts and vertical content.
YouTube thumbnail resizer - 1280 x 720
Crop or fit an image to an exact 16:9 thumbnail and check the preview safe area before downloading.
Resize an image to 1024 x 1024 pixels
Create an exact square output with crop or fit controls for avatars, product previews, and upload forms.
Social media image sizes
Compare common square, portrait, landscape, story, and thumbnail dimensions before exporting.
Image file size guide
Learn why image files become large and how format, dimensions, and quality settings affect uploads.
Resize without losing quality
Use practical checks to avoid stretched, blurry, or over-compressed images.
How FitMyPic tests image output
Review the reproducible checks used for dimensions, format encoding, measured file size, transparency, and target-size export.
FAQ
Image resizing questions
Are my images uploaded?
No. For normal use, image resizing, compression, and preview rendering run locally in your browser.
Which format should I choose?
Use JPG for photos, PNG for transparent graphics or screenshots, and WebP for smaller website images when compatibility is acceptable.
How do I avoid stretching an image?
Keep the aspect ratio option enabled when changing width or height. Disable it only when you intentionally need an exact distorted size.
Why is my exported file still large?
PNG can stay large because it preserves sharp edges and transparency. Use JPG or WebP with a lower quality setting when smaller file size matters more.