PNG Chunk & Workflow Metadata Viewer
Inspect raw binary chunks in PNG files to extract generation prompts, ComfyUI node graphs, seeds, and metadata text — 100% in your browser.
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PNG Binary Chunk Structure
PNG files are composed of discrete 4-byte chunk headers with length, type, payload, and CRC32 checksums. MetaClean decodes all textual chunks natively.
- tEXt chunks: Plain latin-1 key/value pairs
- zTXt chunks: Decompressed zlib deflate streams
- iTXt chunks: UTF-8 international text blocks with compression flags
- caBX / eXIf chunks: Embedded C2PA and EXIF structures
Extracting AI Prompts & Workflow Graphs
Easily inspect and recover lost generation parameters, seed values, and complex node graphs embedded by open-source diffusion interfaces.
- Full text prompt and negative prompt recovery
- Model hashes, LoRA parameters, and sampler steps
- ComfyUI JSON node graph extraction
Zero-Server Architecture
100% Client-Side Privacy Guarantee
Your browser loads the image binary directly into local memory via JavaScript File API.
Metadata extraction and cleaning algorithms execute on your device CPU with zero network transfer.
The sanitized file is saved straight to your downloads folder without touching any remote server.