The context
Check the file beyond its name.
A renamed copy can be identical; two files with similar names can differ. The interface needed to explain precisely what a comparison establishes and what still needs human review.
- Let the user choose the approved edition and its retrieved copies.
- Separate exact byte matches from differences that need investigation.
- Keep source notes and human review beside each result.
The engagement
What we took on.
Product ownership: Board Editions is a Modern Labyrinth-owned product. This case study describes product engineering, not a client engagement or customer result.
From scope to implementation
How the work came together.
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Compare locally
PDFs are compared in the browser without uploading them. An exact match establishes identical bytes, even when a retrieved file has been renamed.
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Make differences actionable
A different file is a review prompt. Content, metadata or export settings can change bytes; the interface explains the need to inspect both PDFs rather than claiming to show what changed.
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Preserve a useful record
Optional check names, source details and review decisions accompany the readable report. The download is a record, not a saved workspace or document archive.
A closer look
The workflow, shown in context.
Actual product screens using fictional examples. Open any image to inspect the original capture.
Take the check into the next handoff
The downloadable HTML report carries filenames, fingerprints, source notes and review decisions into a document that can be read or printed.
Actual downloaded report with fictional example data, October 11, 2026. No real portal or client files were used.
The same result on a phone
The result keeps the approved edition, comparison status and next review action in a single column.
Actual interface with a fictional example, October 11, 2026.
The delivery
A working check with a defined boundary
The public checker and fictional example are live. The example demonstrates the workflow; it does not establish adoption or customer impact.
- Users can compare one approved PDF with up to ten retrieved copies.
- The tool reports byte identity and lets the user record their review.
- It does not choose the approved edition, explain visual changes or verify portal access, printed pages or delivery.
What connects the work
The takeaway.
A document check earns trust by making its evidence and limits as clear as its result.
Explore more work
