IdeaFactory Lab

IDEAFACTORY / IMAGE TOOLS

Your images.
Your finishing mark.

Add a name, a note or your own logo to a whole batch. Place it once or tile it across the image, check the result, then export together.

Processed in your browserText or your own logoNo sign-up

01Add your images

Drop your images hereJPG, PNG and static WebP

Up to 50 images · 20 MiB each · 150 MiB total input
25 megapixels per image · Max 32,768 px per output edge
20 MiB per output · 150 MiB retained output limit

Visible watermarks only. No AI and no watermark removal.

02Make your mark

One line, up to 120 Unicode characters. Use text you have permission to add.
Uses fonts on your device. Chinese and emoji appearance can vary.
#ffffff
Places one mark inside the selected anchor, using the margin below.
6%
Text height, as a percentage of the shorter image edge. Long text is reduced to fit.
65%
Lower values make the watermark more transparent.
3%
Percentage of the shorter edge, kept clear around the watermark or pattern.
92%
PNG is lossless and ignores quality. Re-encoding may increase file size.

Changing a setting, text or logo clears previous outputs. Source dimensions and proportions are kept. Preview both landscape and portrait images before exporting.

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03Your batch

0 images

Your images will appear here

Every added image gets its own result, including failures.

The ZIP includes completed images and manifest.json, which lists every source, output and excluded file. Original files are never overwritten.

01 / A PERSONAL FINISH

A name, a note or a logo

Add a photographer credit, a draft label or your own brand mark. Pick a corner, an edge, the center, or a repeating diagonal pattern.

02 / SCALES WITH THE IMAGE

One batch, different shapes

Watermark size and margin are relative to each image’s shorter edge. Portrait and landscape photos keep their proportions. Long text is reduced to fit.

03 / STAYS LOCAL

Your files stay in this tab

Image processing and ZIP creation happen in your browser. Source images, logo and text are not sent to a server. Clear all releases the batch and logo from memory.

A few useful details

Does this prove ownership or prevent copying?

No. A visible watermark may identify a source or label an image, but it is not proof of ownership and cannot prevent copying or removal. Use only images, logos and text you have permission to use. This tool does not remove existing watermarks and does not use AI.

Can I use Chinese text or a transparent logo?

Yes. Text supports up to 120 Unicode characters on one line, including Chinese. Rendering depends on fonts available on your device; unsupported glyphs may appear as boxes. PNG and static WebP logos can keep transparency. Check the preview before downloading.

Which files are supported?

Source images and logos must be JPG, PNG or static WebP. Animated WebP, APNG, GIF, SVG, HEIC and other formats are rejected rather than silently flattened. Each source is limited to 20 MiB and 25 megapixels; the batch is limited to 50 images and 150 MiB. Logos are limited to 5 MiB, 4 megapixels and 4,096 pixels per edge.

What happens to transparency, dimensions and metadata?

Source dimensions and proportions are preserved after applying EXIF orientation, with a maximum output edge of 32,768 pixels. PNG and WebP can retain transparency; JPEG uses your chosen background. Browser re-encoding may change colors and usually does not copy embedded metadata. This is not a certified metadata-removal tool.

What happens when I cancel or change the settings?

Cancel keeps finished images and stops the queue. Any late result from the current operation is discarded. Changing settings, text, logo or source selection clears earlier outputs, so the ZIP cannot mix different settings. Retry processes only unfinished images.

Why does my ZIP contain a manifest?

manifest.json records the settings, source filenames, output names and results for the entire batch, including failed or cancelled images. Output names are made unique while keeping readable Unicode names. Check the manifest before sharing it because it includes your watermark text and original filenames.