Add Watermark to Image Online
Add a text watermark to any image — privately in your browser. Position, color, size, opacity, rotation, tile. Live preview.
Drop an image here to watermark
PNG · JPEG · WebP · GIF — add text watermark with live preview
How to add a watermark online
Drop an image into the box above. Type the text you want (a signature, copyright, domain, DRAFT marker). Use the controls to set position, color, opacity, size, and rotation. Switch the position to Tile to repeat the watermark diagonally across the entire image — the standard anti-piracy pattern. Click Export and then Download.
Watermark presets that work well
- Photographer signature — bottom-right, white at 65% opacity, size 60%
- Sample / draft marker — center, red at 100% opacity, size 150%, rotation −20°
- Anti-piracy tile — Tile position, white at 30% opacity, size 80%, rotation −30°
- Subtle copyright — bottom-right, white at 40% opacity, size 50%
What you can do
- Custom text watermark with full live preview
- Position: corners, center, or full Tile
- Color picker, opacity 10–100%, size 20–200%, rotation −45° to +45°
- PNG keeps transparency; JPEG re-encodes at high quality
- No watermark from ToolChop, no signup, no upload
Frequently asked questions
How do I add a watermark to an image online for free?
Drop an image into the box above, type your watermark text, and use the controls to pick position, color, size, opacity, and rotation. The live preview updates instantly. Click Export then Download. No account, no upload, no watermark from us on top of yours.
Does ToolChop upload my photo?
No. The watermark is composited in your browser using the Canvas API. Your image never leaves your device — there is no upload, no temporary storage, and no copy on our servers. That is critical for unwatermarked source files you do not want leaking.
What watermark options can I customize?
Text content, position (top-left, top-right, bottom-left, bottom-right, center, or full Tile), color via picker, opacity 10–100%, size 20–200% of a base font, and rotation between −45° and +45°. The preview reflects every change live.
Should I watermark in white or black?
White with 60–70% opacity works on most photos. For very light backgrounds (sky, snow, paper), switch to a dark color and lower the opacity slightly. For tiled watermarks across the whole image, dark grey at 25–35% opacity is the conventional choice — visible enough to deter copying, light enough not to overwhelm the image.
Where should I place a watermark?
For photographer/artist signature use, bottom-right at moderate opacity is the convention. For piracy deterrence, tile across the image with low opacity — much harder to crop out. For social posts, center with low opacity behind the subject is also common.
Can I add an image / logo as the watermark instead of text?
Right now the tool supports text watermarks only — they cover the most common case and stay sharp at any output size. Image-watermark (logo) support is on the roadmap. For now you can use the text mode with a Unicode character (e.g. ©, ®, ™) for symbol marks.
Will the watermark stay readable when the image is resized?
Yes — the size slider is proportional to the image's smaller dimension, so a watermark that looks right on the original will scale with the image when you resize it. If you intend to publish the image at a much smaller size, increase the watermark size before exporting.
What's the best opacity for a watermark?
60–70% for visible signature watermarks; 25–35% for tiled anti-piracy watermarks; 80–100% if you want a strong, unmistakable mark (e.g. SAMPLE or DRAFT). Use the Opacity slider to dial in the exact balance against your background.
Will exporting reduce image quality?
PNG output is lossless — every pixel is preserved. JPEG output re-encodes at 95% quality, which is visually identical to the input but recompresses slightly. If you want zero quality loss, the source image should be PNG.
What image formats are supported?
PNG, JPEG, WebP, and GIF inputs. The output format matches the input — PNG in, PNG out; JPEG in, JPEG out — so transparency is preserved when present.
How do I make a tiled (diagonal) watermark?
Switch the Position dropdown to Tile, then set Rotation to around −30°. This produces the classic anti-piracy tiled diagonal effect. Dial opacity down to ~30% so the watermark deters copying without ruining the image.
Why use ToolChop instead of Photoshop, Canva, or an installed app?
No install, no account, no upload of your source file, and the result is ready in seconds. ToolChop is intentionally minimal — one screen, live preview, one export — so simple watermarking jobs do not require firing up a heavy app.
Can I batch watermark multiple images?
Right now the tool handles one image at a time so you can fine-tune the watermark on a preview. Batch watermarking with a saved preset is on the roadmap. For a handful of files, dropping them in sequence is fast — each export takes 1–2 seconds.