Is my image uploaded for compression?
No. Image decoding, optional resizing, and compression run locally in your browser. The image file is not uploaded for this process.
Balance image quality and file size, inspect the result, and adjust the settings before using the compressed image.
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Image Compressor helps reduce image weight by re-encoding one JPG, PNG, WebP, or AVIF file at a time. Start with Maximum, Balanced, Quality, or Lossless preset settings, then review the chosen format and quality rather than assuming one preset suits every image.
Quality controls the tradeoff between visual detail and file size for JPEG, WebP, and AVIF output. Lower settings can create smaller files but may introduce blocking, banding, blurred edges, or loss of fine texture. Check faces, text, gradients, product edges, and other important details in the result preview before publishing.
Optional width and height settings can reduce pixel dimensions as part of the same workflow. Entering only one dimension preserves the source proportions by calculating the other. Entering both dimensions forces that exact shape and can stretch the image when the target ratio differs from the original.
Choose JPEG for ordinary photos that do not require transparency, WebP for a useful balance of modern compression and transparency support, PNG when transparent pixels or pixel-level integrity matter more than maximum size reduction, or AVIF when the current browser supports its decoder and encoder. JPEG cannot preserve transparent areas, and this tool does not provide a background-color control.
Compression runs locally through browser image and canvas APIs, and the image file is not uploaded for processing. The tool does not guarantee that every result will be smaller, preserve animation or original metadata, or reach an exact target number of kilobytes. Keep the original file and compare the result before replacing it.
Typical tasks this tool is built for.
Image decoding, optional resizing, compression, and export run locally in your browser. The image file is not uploaded for compression. DevToolKit may receive usage and diagnostic metadata, such as format, quality, dimensions, byte counts, page context, and result codes, but the identified compressor analytics do not include the raw image or filename.
Practical tips before you download or share the output.
Compression is a tradeoff, not a guaranteed reduction. Lower quality may introduce visible artifacts, and entering both width and height can stretch the image. PNG ignores the quality slider, JPEG cannot preserve transparency, and AVIF availability depends on browser support. This tool does not target an exact file size or reliably preserve animation and original metadata.
Longer reads that pair well with this tool.
Image guide
A practical image-preparation workflow: choose the required format, set dimensions, review processing labels, and inspect the exported file before sharing.
Image guide
Use DevToolKit's server-backed, AI-assisted Background Remover with supported files, subject presets, browser-side export controls, and clear review steps.
Image guide
Convert one supported image at a time, review transparency and dimensions, then test the exported file in the destination that needs it.
Common next steps after using this tool.
Build one ordered PDF from mixed supported image formats, with one ready image on each page.
Remove an image background, review the cutout, refine its edge softness, and export it with transparency or a new background.
Turn one or more JPG and JPEG photos into a single ordered PDF with one image per page.
Select a rectangular region from one JPG, PNG, or WebP with aspect presets, pixel coordinates, and format-aware export.
Rotate one JPG, PNG, or WebP in 90° steps or mirror it horizontally and vertically, then export a new copy in the source format.
Resize a JPG, PNG, or WebP image by exact dimensions, percentage, or common web and social presets.
Situations where this workflow saves time.
No. Image decoding, optional resizing, and compression run locally in your browser. The image file is not uploaded for this process.
Usage and diagnostic metadata may be sent, including selected format, quality, preset, dimensions, input and output byte counts, page context, and result codes. The identified Image Compressor analytics do not send the raw image or filename.
JPEG is suitable for ordinary photos without transparency. WebP often provides a useful balance of size, quality, and transparency. PNG is appropriate when transparency or pixel-level integrity matters more than maximum reduction. AVIF can compress efficiently, but decoding and export depend on browser support.
Re-encoding does not guarantee a smaller result. A source may already be optimized, and some format, quality, dimension, and image-detail combinations can produce additional overhead. Compare the reported byte sizes before replacing the original.
No. The tool lets you choose format, quality, width, and height, but it does not repeatedly encode toward an exact KB or MB target. Adjust the settings and compare each result when you need to stay below a limit.
Not unless you enter an optional width or height. With one dimension supplied, the other is calculated proportionally. If both are entered, the exact values are used and the image can be stretched.
The PNG export path does not use the lossy quality value. If you need a smaller result, try WebP or reduce the image dimensions while keeping a PNG copy when transparency or pixel integrity is essential.
JPEG cannot retain transparency. This tool also has no background-color selector for JPEG flattening, so inspect the preview and choose PNG, WebP, or AVIF when transparent areas matter.
No animation-preservation workflow is implemented. Images are decoded and re-encoded through a single canvas, so animated sources should be treated as still-image output.
It is not guaranteed. The browser canvas pipeline creates a new encoded image and does not explicitly copy the original EXIF or other embedded metadata.
No. Compression and resizing cannot recreate missing detail. Lower quality or aggressive resizing can remove additional detail, so retain the original and inspect the result carefully.
No. Image Compressor currently processes one file at a time. Complete or reset the current workflow before selecting another image.
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