Photo KB: Online Photo and Signature Resizer to Any Size

Free tools that match exam and application form rules: exact KB, exact pixels, private on your device.

Choose a photo, signature, image or PDF

JPG, PNG, WebP or PDF • then pick a tool

Choose file

🔒 Files open directly in the tool you choose. Nothing is uploaded.

Image Resizer

Change pixels, cm or inches, crop to any ratio and convert to JPG for any upload.

Image

Background Remover

Remove the background from any photo with AI. Download PNG, WebP or JPG.

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Image

Free Image Compressor

Compress many JPG, PNG or WebP images at once. See savings, download all.

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Image

KB Resizer

Resize any image to an exact KB you type: reduce or increase file size.

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Image

Crop and Resize Image

Free or fixed-ratio crop with drag handles, then resize in one step.

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Image

Convert Image to JPG

Convert PNG, WebP, GIF, BMP or AVIF to JPG with white background.

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PDF Tools

Compress certificates to 100KB, 200KB or 500KB, turn photos into PDF and merge files.

PDF

Compress PDF to 100KB

Shrink certificates and ID proofs below 100KB, with a feasibility check.

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PDF

Merge PDF Files

Join several PDFs in any order, optionally compressing the result.

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Signature Resizer

Crop, clean and compress signatures to 10KB, 20KB or 50KB with exam-wise presets.

Signature

SSC Signature Resizer

SSC signature at 4 × 2 cm, 10KB–20KB, with white background and min-KB fix.

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Signature

Signature to 10KB

Compress signature images down to 10KB with clean, dark strokes.

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Signature

Signature to 20KB

10KB–20KB signatures at 140 × 60 px for IBPS, SBI and SSC forms.

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Signature

Signature to 50KB

High-resolution signatures under 50KB for UPSC, NTA and universities.

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Signature

Signature for Exam Form

One-click presets for IBPS, SBI, SSC, NEET, UPSC and CTET signatures.

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Photo Resizer

Resize exam photos to exact KB and pixel rules, make passport-size photos and print name and date.

Photo

SSC Photo Resizer

SSC photo at 3.5 × 4.5 cm, 20KB–50KB, with crop and pass/fail check.

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Photo

Photo to 20KB

Compress a passport photo to 20KB or less, with crop and min-KB check.

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Photo

Photo to 50KB

Reduce a photo to 50KB or below for SSC, IBPS and state exam forms.

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Photo

Photo to 100KB

Compress photos to 100KB for CTET, admissions, scholarships and ID cards.

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Photo

Photo to 200KB

High-quality photos under 200KB for NTA, visa and postcard-size uploads.

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What is PhotoKB?

PhotoKB is a free toolkit to resize photo in KB, format signatures and compress PDFs to the exact rules of online application forms. Pick the tool that matches your notice, such as Photo to 20KB, Signature to 20KB or Compress PDF to 200KB. Upload your file and download a file that passes both the KB limit and the pixel size. Everything runs in your browser.

How do I resize a photo or signature for an exam form?

  • 1
    Read the photo and signature rules

    Note the KB range (for example 20KB–50KB), the pixel or cm size, and the format (usually JPG).

  • 2
    Open the matching tool

    Choose a KB tool, the Passport Photo Resizer or Signature for Exam Form.

  • 3
    Upload, adjust and check

    Set the size and crop, then wait for the green ✓ Valid status.

  • 4
    Download and upload to the portal

    The file is named clearly so you do not mix up photo and signature.

Common upload sizes at a glance

FileTypical ruleBest tool
Exam photo20KB – 50KB, 200 × 230 px or 3.5 × 4.5 cmPhoto to 50KB
Signature10KB – 20KB, 140 × 60 pxSignature to 20KB
Photo with name and dateAs per noticeAdd Name and Date
NTA / high-quality photoUp to 200KBPhoto to 200KB
Certificate PDF100KB – 500KBResize PDF for Form
Photos of documentsOne PDFImages to PDF

These are common values seen in recent notices. Always confirm the latest rules in your official notification.

Why PhotoKB is different

  • Private by design: your photos, signatures and certificates are never uploaded. Many popular tools process files on their servers.
  • Minimum and maximum KB: every KB tool checks both limits and shows a clear pass/fail status, so you avoid "file too small" errors.
  • Exact pixels and cm: presets for common exam sizes, plus custom px, cm, mm or inches with DPI.
  • You control the crop: move and resize the crop box instead of letting the tool cut off your face.
  • PDF feasibility check: see if 100KB is realistic for your page count before you compress.
  • No sign-up, no watermark, no limit: free for students and job seekers.

Frequently Asked Questions

How do I resize a photo in KB online?

Open the PhotoKB tool for your limit, such as Photo to 20KB or Photo to 50KB, upload the photo, choose the pixel size and download. The tool compresses the JPG to stay inside the KB range.

Which tool should I use for an exam photo and signature?

Use Photo to 20KB or Photo to 50KB for the photo, and Signature to 20KB or Signature for Exam Form for the signature. Both check the minimum and maximum KB.

Are my files uploaded to PhotoKB servers?

No. All photo, signature, image and PDF tools run in your browser. Files are processed on your device and never uploaded.

Can I compress a PDF to 100KB or 200KB?

Yes. Use Compress PDF to 100KB, 200KB or 500KB. The tool shows whether the target is realistic for your page count before compressing.

What is passport size photo in pixels?

3.5 × 4.5 cm is 413 × 531 pixels at 300 DPI, or about 276 × 354 pixels at 200 DPI. Use the Passport Photo Resizer to make it.

What if my file is smaller than the minimum KB?

Type the minimum in the Minimum KB box. The photo and signature tools add a harmless padding block to the JPG so it meets the minimum without changing the image.

Do the tools work on mobile phones?

Yes. Every tool works in Chrome, Safari, Edge and Firefox on Android, iPhone and computers, without installing an app.

Is PhotoKB free?

Yes. All tools are free, with no sign-up, no watermark and no daily limit.

Please confirm official guidelines

PhotoKB is an independent utility and is not affiliated with any exam body, commission or government department. Size presets reflect common public notices. Always check the latest official notification before you submit. Read the full Disclaimer and Privacy Policy. Last updated: 8 November 2026.