Step 1 / source
Choose the source
Drop your files here
Choose the images a reviewer should scan together in one visual index.
Checking publication status...LOCAL IMAGE REVIEW PACK / PNG PLUS ORIGINALS
Contact Sheet ZIP Maker
Create a labelled PNG overview and package it with 2 to 30 signature-checked image originals and a CSV manifest.
Processed in this browser2 to 30 PNG, JPEG, or WebP files; 5 MB per image and 60 MB total. Each source is limited to 40 million pixels and the contact-sheet canvas to 25 million pixels.
2-30 images - 60 MB total
No file upload
This operation runs with browser APIs. Nirmion receives catalogue requests, not the selected source bytes.
Original stays unchanged
The converter creates a separately named output. It never writes back into the source file.
Bounded work
2 to 30 PNG, JPEG, or WebP files; 5 MB per image and 60 MB total. Each source is limited to 40 million pixels and the contact-sheet canvas to 25 million pixels.
Plain-language method
How the review pack is built
The browser verifies and decodes each image, scales it proportionally into a clean grid, optionally adds a shortened filename label, exports contact-sheet.png, and packages it with byte-identical originals under images/ plus manifest.csv.
- 01Choose a valid source
Select images in the order they should appear. Animated GIF is excluded because a static contact sheet cannot represent all frames honestly.
- 02Review the conversion choices
More columns make a wider, denser grid. Larger thumbnails improve visual review but increase PNG dimensions and archive size.
- 03Inspect the separate result
The ZIP contains contact-sheet.png, images/, and manifest.csv. The PNG is a review index; the archived originals retain full source quality.
Useful when
Practical jobs this tool handles
- Send a visual asset shortlist for approval.
- Index product photos before a content upload.
- Create a compact photography handoff with originals included.
Before converting
Prepare the review order
- Select files in the intended reading sequence.
- Use labels when reviewers need to reference filenames.
- Check the PNG overview and manifest before sharing.
Know the boundary
The overview is not the master artwork
Thumbnails are scaled into a PNG grid and may omit fine detail. Colour profiles, transparency appearance, and very long labels can look different; use the included originals for final production.
Quick answers
Questions before you convert
The ZIP separates fast review from full-quality use.
Are the archived originals resized?
No. Only contact-sheet.png contains scaled previews.
Why is GIF not accepted?
A single static thumbnail would not describe animation reliably.
How are wide and tall images fitted?
Each image is scaled proportionally and centred without cropping.