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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Resize Image to KB
Choose an image and target KB size, let the browser search encoder quality and reduce dimensions only when needed, then inspect the achieved size, quality, dimensions, and savings before download.
Drop an image here
Target a practical upload limit without sending the file away
File-size budget audit
Turn target KB and max dimensions into a clear byte/pixel compression budget.
| Check | Value | Evidence |
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Use the tool above, then refresh this verification.
—Original
Choose an imageOutput
—Encoder quality
—Dimensions
Original![Source image preview]()
Target-size result
The tool first searches encoder quality, then reduces dimensions only if necessary.Exact byte size is not guaranteed because browser encoders produce discrete output sizes.
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
Practical guide and verification
Use the product workflow above first. These notes add interpretation, verification and limits below the interactive result area.
Treat the KB target as a file-size budget
A target such as 100 KB is a storage or upload limit, not a visual-quality score. Start with the dimensions the destination actually needs, then let the encoder search quality. If the target cannot be reached cleanly at those dimensions, reducing pixel dimensions is usually more honest than forcing extreme compression artifacts.
Check the achieved size, not only the requested size
Lossy encoders do not expose a perfect equation from quality percentage to bytes. The tool searches toward the requested budget, so verify the actual output bytes after encoding. For a hard portal limit, leave a small safety margin rather than aiming exactly at the maximum byte count.
Format choice changes the quality-versus-size tradeoff
JPEG is usually efficient for photographs, WebP often reaches a similar visual result at fewer bytes, and PNG is better suited to transparency or flat graphics but can be much larger for photos. Converting formats can change transparency, metadata and downstream compatibility.
Inspect fine detail at 100% zoom
Faces, text, thin lines and high-contrast edges reveal compression damage earlier than a small page preview. Compare the original and result at actual pixels, especially if the image will be printed, used as an ID-style upload, or passed through another compression step later.
Do not confuse smaller files with higher resolution
Reducing KB does not create detail, and increasing output dimensions cannot recover detail that is not present in the source. Keep the original file, record the output dimensions and format, and verify the final upload in the destination that imposed the size limit.