Resize Image Online
Change the dimensions of any image in seconds. Enter a width or height in pixels, scale by percentage, or pick a preset for Instagram, YouTube thumbnails, Facebook covers, LinkedIn banners, Pinterest pins or passport photos. Aspect ratio is locked by default so nothing gets stretched.
Works with JPG, PNG, WebP, HEIC and SVG. Resize one photo or a hundred at once, choose the output format and quality, and download.
How to convert image to resized image
Add images from your device.
Choose Pixels, Percentage or a Preset and enter your size.
Click Resize and download – individually or as a ZIP.
Why use the Convert Now resize image online
Social media presets
Instagram post and story, YouTube thumbnail, Facebook, LinkedIn, X, Pinterest – one click.
Exact pixels or %
Type a width, a height or both; or scale by percentage.
Batch resize
Resize up to 100 photos to the same size in one go.
High-quality scaling
Smooth, sharp downscaling with no jagged edges.
Resizing without distortion
With Keep aspect ratio on, entering only a width computes the matching height automatically (and vice versa), so people and products keep their proportions. Presets use a smart cover-and-crop: the image is scaled to fill the preset dimensions and any overflow is trimmed evenly from the edges, which is exactly how Instagram and YouTube would crop it anyway.
Resize vs compress
Resizing changes how many pixels an image has; compressing changes how efficiently those pixels are stored. If you need to meet a pixel dimension (‘max 1920 px wide’), resize. If you need to meet a file size (‘max 200 KB’), use the Compress tool, which can also shrink dimensions automatically when needed. Doing both – resize first, then compress – gives the smallest files.
Read the guide: How to Reduce Image Size Without Losing Quality
Frequently asked questions
How do I resize an image without losing quality?
Downsizing keeps images sharp. Avoid enlarging beyond the original size, choose PNG or quality 90+ JPG output, and resize from the original rather than an already-resized copy.
What size should an Instagram post be?
1080×1080 for square, 1080×1350 for portrait and 1080×1920 for stories and reels. All three are available as presets.
Can I resize an image to a specific KB size?
Use the Compress tool and enter a target in KB – it adjusts both quality and dimensions to hit the number.
Can I resize multiple images at once?
Yes, up to 100 per batch with a ZIP download.
Does it work with HEIC or SVG?
Yes. HEIC photos from iPhone and SVG vector files are both supported as input.
Is my image uploaded to a server?
No. Resizing happens in your browser.
Image Tools — all free
Every tool on Convert Now runs in your browser. No account, no limits, nothing uploaded.
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