Stamp text or logo watermarks across dozens of photos with 5 positions and 10–100% opacity control. Photographers protect 200 wedding proofs before sharing — always exports PNG (<name>-watermarked.png) — local Canvas work, 2 free batches a day.
Runs on CanvasJSZip
Content reviewed October 2026 · About Toolzum
Resize hundreds of photos to one exact W×H canvas (default 800×800, inputs 1–10000px) with Contain, Cover, or Stretch fit — no percentage or preset modes. Transparency flattens onto white; output is always PNG. Photographers deliver 400 wedding shots at uniform size — local Canvas work, 2 free batches a day.
Strip all EXIF metadata from JPEG, PNG, and WebP photos by re-encoding each to JPEG at quality 0.95 (files renamed *-noexif.jpg). Strip-only — no inject mode exists. Agents clean 500 listing shots before upload — local canvas work, 2 free batches a day.
Convert iPhone HEIC/HEIF photos to JPG, PNG, or WebP in batch with quality control. Designers pull iPhone shots into any workflow — local heic2any work, 2 free batches a day.
Stamp text watermarks across PDF pages — DRAFT, CONFIDENTIAL, custom text with opacity. Protect 50 filings before sharing — local pdf-lib work, unlimited saves.
Bind hundreds of JPG, PNG, or WebP images into one multi-page PDF with page size, orientation, and fit control. Agents compile 80 property photos into a brochure — local jsPDF work, 2 free batches a day.
Semi-transparent text across the center deters theft most; corner logos brand without ruining previews. For 200 client proofs, use ~40% opacity center text — visible enough to deter, light enough to sell from. No timestamp mode exists.
One configuration applies to the whole batch by design — that uniformity is what makes 200 files finish in minutes. For varied marks, split into groups (proofs vs finals) and run one batch per configuration.
The base photo redraws at full resolution and exports to PNG (never JPG), so no compression loss — but transparency flattens since output is always PNG. Keep originals archived; files over 100MB trigger a memory-confirm first.
No — compositing runs locally in your browser on Canvas; images never leave your device. The watermarked set saves as one Pro download (signed-in free: 2 a day — proofs first, finals after; Pro unlimited).
Batch Image Editor
Downscale a batch of images to one max width (default 1920px) with an optional bottom-right watermark, then download everything as a ZIP. Same max-width and watermark apply to every image — local Canvas work, 3 free images a day.
Bulk Image Format Converter
Convert image batches between JPG, PNG, WebP, and AVIF outputs (JPEG/PNG/WebP/AVIF/HEIC/HEIF/GIF/BMP/ICO/SVG inputs; HEIC via heic2any, SVG rasterized at intrinsic size or 1024px fallback) with a quality slider (10–100, default 80). Pair pages (?from/?to) preset the output. Flat ZIP renamed per file — local, 5-file guest batches, 25 signed-in, 500 Pro.
Gemini Watermark Remover
Remove Google's sparkle watermark from Gemini-generated images — auto-detects 48/96px marks and reverses alpha blending locally. Single images free; batch mode Pro-only.