ProToolBox

Image Resizer Online

Dial exact pixel width and height (or lock aspect), watch the live export preview, then download PNG, JPG, or WebP—all in this tab. No upload, no signup.

Resize image

Match CMS, ad, or email specs—live resized export preview before you download.

1 Choose file · 2 Set WxH · 3 Preview export · 4 Download

Result

Sliders sync with the number fields. Uncheck aspect lock only when you need a non-uniform stretch. The export preview updates as you change size or format.

Export preview
px
px

Tip: link previews often use ~1200×630; square social art is often ~1080×1080.

Runs in this tab only—no server upload, no signup, no watermark.

Choose an image. After it loads, previews and file details update when you change size or format.

Next: Compress · Crop · PNG→JPG · JPG→PNG · Metadata · PDF→JPG · All image tools · All tools

  • Works in your browser—your file is processed on your device
  • We do not store your uploads on our servers
  • Free and instant
  • No account needed
  • Your media stays in this tab until you download or leave

What this is for

Image Resizer Online prepares files for web and email: free and instant, works in your browser. Compress, resize, convert—preview before CMS, storefront, or newsletter (see the page for how files are handled).

  • Compare previews until size and clarity feel right
  • Re-export when crop or DPI requirements change
  • Batch mindset for heroes and thumbnails
  • No account needed for the workflow on this page

Flow: Repeat passes during launches—same tool, predictable steps.

Common output sizes (reference)

  • Open Graph / link previews — ~1200×630 px is a widely used canvas (your artwork can letterbox inside).
  • Square social — ~1080×1080 px is a safe default for many feed cards.
  • Thumbnails — ~256–512 px on the long edge is typical for lists and avatars.

Resize assets once per campaign before upload—keep this page bookmarked next to your CMS.

Quick guide

Set width and height with optional aspect lock; previews and the summary update live. All processing stays in this tab.

  1. Upload an image.
  2. Set target pixels (sliders or numbers) and export format.
  3. Read the benchmark line in the results, then download.

Pair with Image Compressor or Image Cropper; browse all tools.

Privacy: Your images and audio are processed in this browser. We do not receive your files on our servers for these tools.

FAQ

  • Are files uploaded to your cloud? No — resizing runs locally in the browser.
  • Do I need an account? No.
  • Very large images? Browsers can run out of memory on huge files—scale down in steps if needed.

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