Created by Katakata · Last reviewed
How to use Emphasis Lines Studio
Create reusable focus-line assets for thumbnails, comics, slides, and social posts without uploading your source image. The editor supports four line styles, transparent line-only output, positioning, color, taper, density, and repeatable random patterns.
Practical workflow
- Choose Composite image to place lines over a JPEG or PNG, or Lines only to create a transparent asset.
- Select Basic, Hand-drawn, Radial, or Speed, then adjust line count, width, center, aperture, and randomness.
- Check the intended crop, then save a PNG. For a reusable overlay, choose Lines only and place the transparent PNG above your artwork in an image editor. Keep faces and text clear of dense lines.
Accuracy and limitations
PNG follows the selected output mode. SVG embeds a PNG of the lines only; it does not include the background image, add resolution, or provide editable vector paths. Large exports depend on device memory, and resizing or compression in another editor can alter their appearance. You may use generated images commercially without attribution. Do not redistribute the tool or resell the generated images themselves, including in asset packs.
Privacy and data handling
Uploaded images and line settings are processed locally in the browser. They are not sent to KatakataLab. Analytics can record ordinary page-view information, but not the image content you edit.
Why this page exists
KatakataLab publishes small browser tools built from recurring design and development tasks. This English page is maintained as a complete entry point, not as an automatic translation or a doorway page. If a control, explanation, or result is unclear, use the contact page and include the tool name, browser, and expected result without sending confidential input.
For another workflow, browse the English tool index or switch to the Japanese version.