- What makes a good photo for neon effects?
- High-contrast images with clear outlines work best — portraits with sharp facial features, city skylines, architecture with defined edges, or objects against a plain background. Flat, low-contrast images (overcast skies, close-up textures) produce fewer visible edges, so the neon lines will be sparse. Night photos already have a dark background and tend to produce especially dramatic results.
- Is my photo uploaded to any server?
- No. The entire process — reading the file, processing pixels, and generating the download — happens inside your browser using the HTML5 Canvas API. Your photo never leaves your device. This is why there is no account, no file size limit enforced by a server, and no waiting for an upload to complete.
- How do I get the brightest possible glow?
- Set Glow Intensity to 8–10 and Edge Sharpness to 7–9. Use a subject with strong, well-defined edges (a face, a car, lettering). Cyan (hue 180°) and magenta (hue 300°) tend to read as the most visually intense neon colors on screen because they contrast strongly with dark backgrounds. If the glow looks washed out, try increasing Edge Sharpness — a crisper edge map makes the bloom more concentrated.
- What file format does the download produce?
- The output is a full-quality PNG file. PNG is lossless, so there is no compression artifact added on top of the effect. The downloaded file is named
neon-effect.png. If you need JPEG, open the PNG in any image viewer and export or save-as JPEG from there.
- Can I use the result commercially?
- The neon effect tool itself is free with no usage restrictions. However, the rights to the output image depend on the rights to your original photo. If you own the photo (you took it), the neon version is also yours. If you used a stock photo, check its license — applying a filter does not change the underlying copyright of the source image.