Image Tweaker

Quick image transformations for UX and design work: invert colors, switch to grayscale, or apply a simple sepia or threshold pass in-browser.

Launch tool Request custom workflow →

Quick start

1 Add one or more image files.
2 Pick an effect (invert, grayscale, sepia, or threshold).
3 Apply the effect and download the output or the full batch as ZIP.

Image Tweaker

Quick image transformations for UX work: invert colors, grayscale, sepia, or threshold. Runs locally in your browser.

Image files

Choose images or drop them here JPG, PNG, WebP, AVIF, GIF, BMP, TIFF - up to 40 files - 25 MB each

Effect Output format Quality: 88

Ready. Pick images and choose an effect.

Report: No results yet.

File	Input	Output	Delta	Action

{"title":"Image Tweaker","lead":"Quick image transformations for UX work: invert colors, grayscale, sepia, or threshold. Runs locally in your browser.","files":"Image files","drop":"JPG, PNG, WebP, AVIF, GIF, BMP, TIFF. Up to 40 files, 25 MB each, 320 MB total.","effect":"Effect","effectInvert":"Invert colors","effectGrayscale":"Grayscale","effectSepia":"Sepia","effectThreshold":"Threshold (black and white)","threshold":"Threshold","output":"Output format","original":"Keep original","quality":"Quality","run":"Apply effect","zip":"Download ZIP","clear":"Clear list","ready":"Ready. Pick images and choose an effect.","validating":"Validating files...","processing":"Processing images...","exporting":"Preparing output...","done":"Processing complete.","warning":"Completed with warnings.","error":"Processing failed.","report":"Report","noReport":"No results yet.","tableFile":"File","tableInput":"Input","tableOutput":"Output","tableDelta":"Delta","tableAction":"Action","download":"Download","statusPending":"Pending","statusProcessing":"Processing","statusDone":"Done","statusError":"Error","previewBefore":"Before","previewAfter":"After"}

Typical use-cases

Preview how an image looks under a dark-mode treatment by inverting colors.
Generate a quick grayscale variant to check contrast or color-blindness safety.
Produce a simple sepia or threshold pass for moodboards or mockups.
Batch-transform a folder of screenshots before sharing with reviewers.

Feature overview

Effects: invert, grayscale, sepia, threshold (with adjustable cutoff)
Per-image preview with before/after comparison
Output format selector (original, PNG, JPEG, WebP)
Batch processing with ZIP export
Local browser processing with no own-server upload

FAQ

Are my images uploaded anywhere?

No. Decoding and re-encoding run locally in your browser tab.

Will this tool grow beyond the current effects?

Yes. The tool is built as a small UX-image hub and can host additional adjustments such as brightness, contrast, or hue rotation later.

Need this as a custom workflow or plugin?

Share a short requirement and continue to direct inquiry.

Note

Browser compatibility, file size limits, and output quality vary by input and device. Share links include tool settings in the URL only. No files are stored on my server.