Fix source and dimensions
Do not directly compare different sizes or colour spaces.
ImgIng / Measure compression by quality, alpha and compatibility
BENCHMARK · METHODOLOGYMeasure compression by quality, alpha and compatibility—not bytes alone
“Smaller” does not automatically mean “better.” ImgIng separates file size, PSNR, visual fidelity, alpha edges, playback support and encoding time so one metric never replaces the whole decision.
PSNR is not perception45.8 dB is one referenceLimits disclosedChoose by workload
Capability quick facts
These facts describe the current product, not unshipped roadmap work.
- Reference
- One 256-colour PNG-8 sample at about 45.8 dB
- Measure together
- Bytes, PSNR, perceived detail and alpha edges
- Hold constant
- Source, dimensions, colour space and settings
- Claim boundary
- One sample is not a universal ranking
Reviewed by the DataDance product and engineering team · Published · Updated
Finish in three steps
Confirm important settings before export; the processing location is always disclosed.
Record settings and size
Keep palette size, dithering, quality, resize and format settings.
Review metrics and pixels
Use PSNR for regression, then inspect text, lines, gradients and transparent edges.
What does 45.8 dB mean?
It is an existing 256-colour PNG-8 reference result used to detect algorithm regressions. It is not an average, a universal guarantee or sufficient proof that one tool always wins. Screenshots, photos, flat artwork and alpha shadows need separate test groups.
Format choice matters more than a universal “quality 80”
Prefer WebP, JPG or AVIF for photos; PNG-8 for limited-colour alpha graphics; GIF for maximum animation reach; WebP for modern web animation; and APNG for short, true-colour alpha animation.
Updated 2026-08-20 · Live capability detection inside the tool is authoritative
Frequently asked questions
These visible answers match the current product behaviour and structured data.
Is higher PSNR always better?
No. PSNR is useful for pixel regression, while perceived texture, outlines, text and transparent edges still require visual inspection.
Is 45.8 dB an average across all images?
No. It is one current 256-colour reference sample, not a universal result.
Should codec tests use equal file size?
Both equal-size and equal-quality comparisons are useful, but their conclusions must not be mixed.
Explore ImgIng
Each task page documents real settings, limits and format advice—not keyword-swapped duplicates.