Compress Image to 30 KB

Railway Recruitment Board (RRB) and other Indian Railways notifications often specify a signature in the 30-49 KB band — noticeably larger than the 10-20 KB signature most other exams want — and 30 KB is the floor of that range. Applicants who compress their signature down to the usual 20 KB get bounced by RRB for being under-size, so hitting the 30 KB mark matters. This tool searches JPEG quality to sit right around 30 KB, keeping the signature dark and clean while satisfying the Railways minimum, without uploading anything.

🔒 Everything runs in your browser — nothing is uploaded
Drag & drop an image
or click to browse — you can also paste (Ctrl/Cmd + V)
Compress to under 30 KB
JPG PNG WEBP

🔒 Your image never leaves your device — everything runs in your browser.

Railway Recruitment Board (RRB) and other Indian Railways notifications often specify a signature in the 30-49 KB band — noticeably larger than the 10-20 KB signature most other exams want — and 30 KB is the floor of that range. Applicants who compress their signature down to the usual 20 KB get bounced by RRB for being under-size, so hitting the 30 KB mark matters. This tool searches JPEG quality to sit right around 30 KB, keeping the signature dark and clean while satisfying the Railways minimum, without uploading anything.

Good to know

  • Built for the RRB / Railways 30-49 KB signature band, where the usual 20 KB signature is too small.
  • Aims at the 30 KB floor so the file passes Railways' minimum-size check.
  • Keeps signature strokes solid and legible rather than fading them to hit the size.
  • Takes JPG, PNG or WebP and returns a JPEG the RRB portal accepts.
  • Runs on-device — your signature and photo aren't uploaded to any server.

Related image tools

Need more control? Use the full Compress Image tool to pick your own target, or Resize Image to change the pixel dimensions first.

How it works

Three steps. No sign-up, no upload, no wait.

1

Add your image

Drop in a JPG, PNG or WebP, click to browse, or paste it — nothing is uploaded.

2

Compress to 30 KB

The tool finds the best quality that still fits under 30 KB.

3

Download

Save the compressed image, ready to upload to the form.

🔒

Private by design.Everything happens right here in your browser. Your files are never uploaded — we never see them.

Frequently Asked Questions

Why does RRB want a signature around 30 KB when other exams accept 20 KB? ▼
Railways notifications commonly set the signature band at 30-49 KB, higher than the SSC/IBPS 10-20 KB range. It's simply a different portal specification, so a signature sized for SSC can be rejected by RRB as too small.
My signature won't reach 30 KB — how do I make it bigger? ▼
A tightly cropped, low-DPI signature can fall under 30 KB. Re-scan at higher resolution or keep a little white margin, then compress; the extra detail lifts the file into the 30-49 KB band.
Is 30 KB also used for photos? ▼
Some forms accept a photo around 30 KB, but Railways photos usually sit in a higher band. Check whether your 30 KB requirement is for the signature or the photo before compressing.
How do I know I've hit the band and not gone under? ▼
The tool shows the exact output size, so you can confirm it's at or above 30 KB and below 49 KB before uploading to the RRB site.
Does the image leave my computer? ▼
No. Compression is done locally in your browser — no upload, no account, no server storage.

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