Batch PNG Chunk Analyzer
Deep dive into PNG and JPEG internal structures. Inspect every chunk and marker in bulk with high precision, entirely in your browser.
Drop your images here
Analyze PNG chunks and JPEG markers. Supports hundreds of files at once.
Try with Examples
Loaded Gallery
Chunk Inspector
Internal Structure (Chunks/Markers)
Inspection Queue
| Preview | File Info | Structure | Status | Action |
|---|
Select file to view details
Analyzer Options
Batch Apply
Sync settings for all images
Why Use PNG Chunk Analyzer?
Understanding the internal structure of image files is crucial for optimizing web performance, ensuring data privacy, and conducting digital forensics.
Deep Chunk Inspection
Break down PNG files into critical (IHDR, IDAT, IEND) and ancillary (tEXt, pHYs, gAMA) chunks. View raw data and CRC verification for each part.
Privacy & Metadata
Identify hidden metadata chunks like tEXt or iTXt that might contain sensitive information. Verify that your images are stripped of tracking data.
Forensic Verification
Validate image integrity by checking chunk order and CRC sums. Detect malformed or corrupted chunks that might cause rendering issues.
How to Analyze Image Chunks
Upload Your Images
Drag and drop one or more images. We support detailed chunk parsing for PNG and marker analysis for JPEG.
Inspect the Structure
View the list of chunks in order. Filter by critical or ancillary types to focus on what matters to you.
Export the Report
Download a detailed structure report in TXT or JSON format, or save the image in a different format.
Frequently Asked Questions
What are Critical Chunks in PNG?
Critical chunks are required for displaying the image. These include IHDR (header), IDAT (pixel data), PLTE (palette), and IEND (end marker). If any are missing, the file is invalid.
Can I see hidden text in PNGs?
Yes! This tool parses tEXt, zTXt, and iTXt chunks, which often store metadata like software name, author, copyright, or custom key-value pairs.
Does this tool upload my images?
No. All analysis is performed client-side in your browser using JavaScript. Your images never leave your computer, ensuring total privacy.