Pillow Python Tools
Free, browser-based tools that generate working Pillow code for you. Everything runs locally in your browser — nothing is uploaded, no account required. These are independent utilities that complement the official Pillow documentation.
RGBA to JPEG Fixer
Fix the classic cannot write mode RGBA as JPEG error. Pick a matte colour and quality, preview alpha compositing live, and copy a production-ready conversion function.
1-Bit Binary Threshold
Convert images to pure 1-bit black & white with fixed cutoff, live Otsu, Floyd–Steinberg error diffusion, or a Bayer 4×4 ordered dither — plus the matching Pillow code.
Open the studio →OpenCV Matrix Converter
Generate correct conversion code between Pillow (RGB), OpenCV (BGR), NumPy arrays, Base64 data URLs, PyTorch tensors, and BytesIO buffers — avoiding the classic channel-order bugs.
Open the converter →ImageGrab Screenshot Builder
Build screenshot scripts for full screen, custom bounding boxes, multi-monitor captures, and clipboard grabs — including the Windows high-DPI awareness boilerplate.
Open the builder →Watermark Generator
Design text or logo watermarks with live opacity, rotation, 9-quadrant positioning, and diagonal tiling, then copy a complete alpha-compositing script.
Open the studio →Looking for a fix, not a tool?
Browse the Pillow troubleshooting index — a searchable list of the most common Pillow errors and exactly how to fix them.