WebToolArcBrowser-local limits
Canvas-based export is browser dependent. PNG is broadly available; JPEG/WebP quality and support can vary, and metadata may not be preserved through canvas re-encoding.
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Image Tools
Image Histogram Analyzer
Load an image to inspect 256-bin red, green, blue, and luminance histograms plus practical exposure statistics without uploading the file.
Choose an image for tonal analysis
JPG, PNG, or WebP · local RGB/luminance histogram
—Average luminance
—Near-black ≤ 5
—Near-white ≥ 250
—Median luminance
—Pixels analyzed
Choose an imageHistogram clipping percentages are descriptive signals, not an automatic quality judgment.
Core image workflows
Use a flagship page for the highest-demand resize, compression, crop and conversion jobs; specialist image tools remain available from the full hub.
Image ResizerResize by pixels or percentageImage CompressorReduce file size with controlsImage CropperCrop visually or by coordinatesImage ConverterConvert JPG, PNG and WebPJPG to PNGConvert JPEG into PNGPNG to JPGExport PNG as JPEGHEIC to JPGConvert phone HEIC/HEIF photosWebP to JPGExport WebP as JPEG
Luminance percentile & clipping report
Extend the 256-bin luminance histogram with standard deviation, P5/P95, tonal span and exact black/white clipping counts, then export the bins for external review.
—Std. deviation
—P5 luminance
—P95 luminance
—0 / 255 clipping
Load an image in the main histogram first.