PDF · photo · signature · exact KB

Hit the limit. First try.

Image-only compressors stop at JPEG. Portals also want PDFs under 200 KB, passport photos in 3.5 × 4.5 cm, and signatures under 20 KB. Processed in this tab on underkb.online.

  • 100% client-side
  • Nothing is uploaded
  • No account
  • Canvas / WebAssembly on your device
PDF + image

Exact-size compressor

10 / 20 / 50 / 200 / 300 KB. The 367 KB leftover that “extreme” mode never fixes.

Open tool Exam + visa

Portal photo

Centimetres, white background, and the KB cap in one step.

Open tool Upload field

Signature PNG

Ink on paper → transparent PNG under 20 KB.

Open tool
Image to 10 KB Image to 20 KB (SSC) Image to 50 KB Image to 100 KB Image to 200 KB PDF to 200 KB PDF to 300 KB JPG / PNG / WebP

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