tools / image
Image Resizer
Resize images to custom dimensions with aspect ratio lock. Export as JPEG, PNG, or WebP.
Drop an image or click to upload
PNG, JPG, WebP, GIF
FAQ
- Does this upload my image to a server?
- No. Resizing happens entirely in your browser using the Canvas API. Your image never leaves your device.
- Which format should I use?
- WebP produces the smallest files at equal quality — ideal for web use. JPEG is best for photos when broad compatibility matters. PNG is lossless and best for images with text, logos, or transparency.
- Will resizing reduce quality?
- Scaling down (making smaller) generally looks fine. Scaling up (making larger) will look blurry because the extra pixels are interpolated — no resizer can add detail that wasn't in the original.
ABOUT THIS TOOL
Upload an image, set a target width or height, and the tool resizes it while giving you the option to lock the aspect ratio so nothing looks stretched or squashed. Export the result as JPEG, PNG, or WebP depending on where the image is headed. This is the tool to reach for when a platform demands an exact pixel size — a profile picture that must be 400x400, a product photo capped at 1200px wide, or a banner that needs to fit a specific ad slot. Resizing down also tends to reduce file size, since fewer pixels means less data to store.
HOW TO USE
- Upload the image you want to resize.
- Enter a new width or height in pixels.
- Toggle aspect ratio lock on to keep proportions, or off for an exact custom size.
- Choose an output format: JPEG, PNG, or WebP.
- Preview the resized image and download it.
COMMON USE CASES
- An online seller resizing product photos to the exact 1000x1000 square dimension required by a marketplace like Etsy or Amazon.
- A job seeker resizing a headshot to the pixel dimensions a resume or LinkedIn template requires.
- A blogger shrinking a 4000px-wide camera photo down to 1200px so it doesn't slow down page load.
- A social media manager resizing a graphic to fit an Instagram post, story, or banner slot with a different aspect ratio.
- A developer generating multiple sizes of the same hero image for responsive srcset breakpoints.
TIPS & COMMON MISTAKES
- Enlarging an image beyond its original resolution won't add real detail — it just stretches existing pixels and can look blurry.
- Lock the aspect ratio unless you specifically want to crop or distort the image, since unlocked resizing can visibly warp faces and logos.
- WebP output at the same visual quality is usually smaller than JPEG or PNG, so pick it when file size matters more than compatibility with older software.
- Resize before compressing, not after — starting from the correct pixel dimensions gives the compression step less data to work through and better results.
MORE QUESTIONS
- Will resizing an image down reduce its file size automatically?
- Generally yes, since fewer pixels means less raw data, but the exact savings also depend on the format and quality settings you export with.
- What happens if I only enter a width and leave height blank?
- With aspect ratio lock on, the tool calculates the matching height automatically so the image doesn't distort.
- Can I upscale a small image to a larger size?
- Yes, but the tool can only interpolate existing pixel data — it cannot recover detail that was never captured, so very large upscales look soft.
- Which format should I choose for a photo versus a logo?
- JPEG or WebP suit photos with lots of color gradients, while PNG is better for logos or graphics with flat colors and sharp edges, since it avoids compression artifacts.
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