Batch Image Processing Workbench

It combines a batch recipe with per-image overrides, source crops, multiple output variants, color adjustments, borders, watermarks, contact sheets and reports. The focused converter remains useful for quick one-step conversions.

JPG, PNG, WebP and HEIC/HEIF still images. Use up to 40 files, 20 MiB per file and 100 MiB combined, with at most 16 million pixels per decoded image. The local HEIC decoder uses the primary still image. Additional images, motion, HDR and metadata are not retained.

Yes. Select an image and choose Selected image only. Its full recipe is saved as an override. Use shared settings removes that override. Drag or precise crops always affect the selected original only.

Yes. Main output uses your recipe; up to three additional variants change dimensions, fitting mode and format. Other recipe settings carry over. Each output is named uniquely, and ZIP grouping by variant is enabled by default.

Conflicting output paths are matched case-insensitively and receive numbered suffixes. The filename pattern supports name, index, variant, width and height tokens. Different variant folders can contain the same leaf filename safely.

Longest side and Fit retain proportions. Fill crops to a fixed box using the focal point; Pad fits inside a fixed canvas; Stretch can distort proportions. Percentage scales the cropped image. Disable upscaling to avoid enlarging source pixels; Fill/Stretch can report an error when the requested box needs enlargement.

No. JPG/WebP quality is tested down to the selected minimum. Dimension reduction is optional. PNG quality is not adjustable. The measured result reports whether the target was met; an unmet target remains downloadable.

No. Recipe JSON contains shared or selected-image settings, variant sizes and an optional watermark logo. Original photos, source-specific crops and other image overrides are excluded. Treat a logo-bearing recipe as private when appropriate.

The downloaded copy contains the processed result; the original file remains unchanged. Crop is applied before rotation and resizing. Transparent corners require PNG/WebP; JPG uses the chosen background matte. Re-encoding does not preserve all original metadata or color/HDR properties.

The batch continues and records failures by source and variant. Successful outputs remain available, including after cancellation. Settings changes clear old outputs to avoid downloading a result built with earlier settings. Output storage is limited to 100 MiB and ZIP downloads to 105 MiB.

Decoding, canvas adjustments, encoding and ZIP assembly run locally using existing browser libraries. No processing upload or saved image history is used. Website ads and analytics follow the privacy information.