Workflow guide · 11 November 2026
Resize, describe, mask or chart an image: choose the operation first
By İsmail Tekindemir · 2 min read
Four image-related sites do very different things. Start with the output you actually need.
Ownership disclosure: Taskfield Journal and all 17 featured sites are operated by İsmail Tekindemir. These are owner-written product guides, not independent reviews or paid third-party rankings. No ratings, user counts or traffic claims are implied.
“Work with an image” is too broad a task description. A smaller file, an accessible description, a covered private region and a stitch chart are four different outputs. Choosing the right operation avoids confusing a format change with a content or privacy review.
For size and format: Global Tools Hub
Its image utilities resize, convert, re-encode, inspect dimensions, sample a pixel colour or create a Base64 data URL. Re-encoding is not guaranteed to make the file smaller. JPEG does not preserve transparency; the tool uses white for that background. Animation is not preserved. Compare the actual result before replacing an image on a page.
For the image’s role in a page: Altfolio
Altfolio keeps a manual draft beside context and a role classification. A functional image needs an alternative that conveys what it does; a decorative image can call for an empty alternative. This decision depends on the destination page, not just the pixels. The app does not use AI or certify accessibility. Reviewed HTML still needs correct image paths and a check in the real page.
For covering selected pixels: MaskHarbor
Opaque rectangles are appropriate when you have decided a region should not be visible in the output. Inspect other occurrences of the same detail in headings, thumbnails and background areas. Build and review a new PNG after the final edit, then share that export rather than the original. The masking percentage is geometry, not a measure of disclosure completeness.
For a small craft experiment: Threadtile
A colour-grouped symbol chart is a creative transformation. Sample a small grid, manually correct the cells and calculate the fabric rectangle from the effective stitch count. RGB palette values are not commercial thread codes, and the app does not calculate skeins. Chart exports omit the original image but can still reveal its visual content.
Keep the handoffs explicit
These sites do not automatically pass files between one another. Download the intended output, review it and select that file in the next tool if you choose to continue. Preserve source images and editable JSON where applicable. Local image processing does not make a website visit anonymous: hosting still receives ordinary page requests.