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Signature Resize Online

Resize your signature to the width and height an application form asks for, under its file size limit. Free, and nothing leaves your device.

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Upload your images (0/12)

Or drag & drop images in this page

Supports JPG, JPEG, PNG, WEBP, PDF, HEIC formats

Images Never Leave Your Device

Or try with sample images:

100% Free & no login required. Your images never leave your device.

How It Works

Step-by-step guide to signature resize to exact specifications

Upload Your Signature

Drag and drop a photo or scan of your signature, or pick one from your phone gallery. JPG, JPEG, PNG and WebP files all load. Sign in dark ink on plain white paper first, so the strokes stay clean.

Check The Preset Size

The 300×80px, 20KB JPEG target is already applied, so there's nothing to type. If your scan has a different shape, choose a fit mode. Your form wants another size? Look for a page made for that exact size.

Preview And Download

Check the preview and the new file size, then download your JPEG. The whole job ran in your browser, so your signature was never uploaded. On a shared computer, clear the files when you're done.

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Why Choose Imresizer?

Fast, secure, and completely free image resizing

  • Common Portal Size Pre-Filled

    The page opens with 300×80px and a 20KB JPEG limit already applied, a size many exam and job portals ask for. You don't type any numbers. Add your file and the target is ready.

  • Know Which Size You Need

    Forms ask for signatures in many sizes, in px, cm or mm. Common ones include 6×2 cm, 50×20 mm and 3.5×1.5 cm. Match the number printed in your notice to the preset here, and look for a page made for that exact size if it differs.

  • Stays On Your Device

    Your signature is resized inside your browser and never sent to a server. That matters for a scan of your handwriting, which is the kind of file you'd rather not hand to an unknown website.

  • Small File, Strokes Intact

    Signatures are mostly white paper, so they compress well. The tool keeps the output under the size cap while holding the pen strokes sharp enough that a reviewer can still read them.

  • Fit Modes For Odd Scans

    A phone photo of a signature rarely has the same shape as the target frame. Pick Add Padding to keep every stroke, or Crop to trim the empty paper around it, before you download.

  • Batch Up To 12 Files

    Need your signature and a few spare scans at the same size? Drop in up to 12 files together and all of them come out resized in one pass. Mixed formats are fine, so a PNG scan and a phone photo can share the batch.

  • Free With No Watermark

    No account, no trial, no daily cap, and nothing stamped on your signature. Come back as often as the next form needs, on any device you like.

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Frequently Asked Questions

Everything you need to know about image resizing

How do I do a signature resize online?

Upload a photo or scan of your signature, check the preview, and download the result. The page is preset to 300×80px and a 20KB JPEG, so there's nothing to enter. It runs in your browser in a few seconds, with no software to install.

Can I do a signature resize in cm for my application form?

This page is preset in pixels. When your form states the signature size in cm or mm, such as 6×2 cm, 50×20 mm or 3.5×1.5 cm, look for a page built for that exact size. Each one is preset to its own width and height, so you only upload the file.

What signature resize width and height in cm should I use?

Use whatever number your form or exam notice prints, because the portal checks against that exact size. Signature fields are usually a wide, short strip. If the notice only lists pixels, the 300×80px preset on this page is a common choice.

What is the 300×80px signature size used for?

Many central and state exam and job portals ask for a signature at 300×80px, as a JPEG under 20KB. Always read your own notice, because limits differ by portal and even by year. If yours matches, this page is ready to use as it is.

My signature photo is the wrong shape. Which fit mode should I pick?

There are four. Stretch image is the default and distorts the signature to force-fit the frame. Crop keeps proportions and cuts off whatever falls outside. Add Padding keeps the whole signature and fills leftover space with colored bars. Fill Frame scales the image up to cover the frame and trims the overflow. For a signature, Add Padding is usually safest on white paper, since no stroke gets cut off.

Will resizing make my signature blurry or thin?

Shrinking a large photo to a small frame softens fine lines a little, but dark ink on white paper holds up well. A thick pen helps. Check the preview before you download, and if the strokes look faint, rescan with better light.

Are my files uploaded to a server when I use this tool?

Nothing is uploaded. All the processing happens inside your browser, on your own device, so your signature never touches an external server. It stays private from the moment you add the file until you delete it.

Is this online signature resize free to use?

It's completely free. There's no account to create, no watermark on the downloaded image, and no limit on how many signatures you can resize.

Which file formats can I upload?

JPG, JPEG, PNG and WebP files all load. The download is a JPEG, which is what most portals expect for a signature. A PNG scan with a clean white background works as well as a camera photo.

My form has a different KB limit. What should I do?

This page keeps the file under 20KB. If your form names another limit, such as 10KB or 50KB, open the matching resize image to KB page instead. It brings any file under that exact cap.

Can I resize my signature on my phone?

It runs in any modern mobile browser, so you can pick a photo straight from your gallery or take a new one of your signed paper. The finished JPEG saves to your phone, ready to attach to the form.

How do I get a clean signature photo before resizing?

Sign with a dark pen on plain white paper and shoot it in daylight, straight from above. Hold the phone parallel to the page so there's no shadow or tilt. A flat, evenly lit photo resizes far better than a crooked one.
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