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API Watermark
Developer API that burns watermarks into image, video and PDF pixels at batch scale, with dynamic per-output variables
0Visit API Watermark
https://apiwatermark.com
About API Watermark
API Watermark is a single-purpose developer API for burning watermarks into images, video and PDFs at production scale. The important technical distinction it leads with is that watermarks are applied to pixels rather than written into metadata, which is what separates an actual watermark from a tag that any converter strips. Coverage spans PNG, JPEG, WebP and AVIF for images, MP4, MOV and WebM for video, and multi-page PDFs with vector content preserved rather than flattened — the PDF handling in particular is the part most general image APIs get wrong. Three surfaces are offered against the same engine: a browser editor that needs no signup for up to ten files, a REST API endpoint for programmatic use, and a batch mode for bulk jobs advertised at over a thousand files. Sub-second latency is claimed for image operations. Paid features are the ones a production integration actually needs: custom font uploads, watermark presets, dynamic variables so each output can carry a per-recipient identifier, usage analytics and a priority video queue. That dynamic-variable capability is the one that turns this from a convenience utility into leak-tracing infrastructure for anyone distributing licensed media. Free tier is 100 credits a month, which is enough to build and test an integration but not to run one.
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Key Features
API Watermark Pros & Cons
✅ Pros
- +Dynamic variables make per-recipient leak tracing possible in one API call
- +PDF support preserves vectors instead of flattening the document
- +You can test the engine on real files before creating an account
⚠️ Cons
- −100 free credits a month is a build-and-test allowance, not a usable free tier
- −Video file-size ceiling of 500 MB on Pro will block long-form content
- −Single-purpose — no adjacent transforms, resizing or format pipelines
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