case-study · compress image under 200KB case study

Compress an Image Under 200 KB

This case starts with the original dimensions and finds a JPEG setting that clears a 200KB upload limit.

Case result

  • Input: 1600x1067 photo-style JPEG.
  • Steps: test JPEG q80, q70 and q60.
  • Output: JPEG q60 at 143 KB.
  • Limit: q70 measured 200 KB, which can be too close to strict limits.

Input, steps, output and limits

StageSetting or checkMeasured resultDecisionLimit
InputJPEG q1001.37 MBToo largeNo upload
StepJPEG q80303 KBStill above targetNeed more compression
StepJPEG q70200 KBBorderlineStrict systems may reject
OutputJPEG q60143 KBMeets targetCheck artifacts

Input

The case uses the same generated image sample set as the benchmark pages so the file sizes can be reproduced.

No visitor image is used, uploaded or stored for this case study.

Steps

The workflow records the original format and size, tests one or more output settings, checks the visible result and keeps the smallest result that still fits the task.

The related benchmark link explains the format or quality setting behind the choice.

Output

Input: 1600x1067 photo-style JPEG.

Steps: test JPEG q80, q70 and q60.

Output: JPEG q60 at 143 KB.

Limit: q70 measured 200 KB, which can be too close to strict limits.

Limits

This is a measured task example, not a guarantee for every file.

Images with more texture, transparency, text, animation or platform rules can need different settings.