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Email signature image resizer

Small, sharp logos and headshots for Gmail, Outlook and Apple Mail signatures.

  1. Upload
  2. Edit
  3. Download

Edit your image

Preset

Drop images here, or paste with Ctrl+V

JPG, PNG, WebP, GIF or HEIC. Several at once is fine.

No batch limit · no paywall · nothing uploaded without your OK

Settings size, KB limit, format, DPI
1 to 100, empty = automatic
{name} = original name, {w} and {h} = width and height in px, {n} = number in the list

    Your image is ready

    Resized preview
    BeforeAfter
    File size
    Dimensions
    Format

    Your images are processed on this device. Nothing is uploaded unless you choose to share it, or your device can't handle an image and you agree to shrink it on our server (deleted right away).

    Settings

    Crop image

    Drag the box to move it and the corners to resize. With the box focused, arrow keys move it and Shift+arrow keys resize it.

    Compare before and after

    Drag the divider, or focus it and use the arrow keys. Zoom 1:1 shows the resized image pixel for pixel.

    Before
    After

    Example with a real photo

    We ran this tool on the photo below. These are the real results.

    Original4032 × 2929 px · 403.5 KB · JPG
    Result300 × 218 px · 26.5 KB · PNGThis is the actual file the tool made.

    Photo: Unsplash

    What this page does
    Logo300 px wide, PNG, under 50 KB
    Headshot200 × 200 px, under 30 KB
    Banner600 × 100 px, under 50 KB

    Platform sizes change from time to time. These are the commonly recommended sizes as of November 2026; check the platform's help centre if an upload is rejected.

    How to use it

    1. Pick the preset that matches where the image goes.
    2. Drop your image and check the preview.
    3. Download and upload it.

    Getting the email signature image size right

    Large images in a signature make every email heavy, and some mail apps shrink or block them. Signature images are shown small, usually 100 to 300 pixels wide.

    Saving at twice the display size keeps them sharp on high-resolution screens while staying light.

    Questions

    Should the logo be PNG or JPG?

    PNG for logos with flat colours or transparency, JPG for photos. The presets choose for you.

    Is my photo uploaded to a server?

    No. The resizing runs inside your browser with JavaScript, so the image stays on your device. Nothing is uploaded unless you choose to share it with "Share by link" in the Download step. Once the page has loaded, resizing keeps working even if you go offline. If your device can't handle an image, the tool can shrink it on our server instead, but only if you agree, and it is deleted right away.

    Your images stay on your device unless you share them by link. Ads keep this tool free. If you allow it, our advertising partner Google can use cookies to show you personalised ads and measure them. If you reject, Google shows only non-personalised ads, without advertising cookies. You can change this at any time under "Cookie settings" at the bottom of the page. Privacy policy