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MARC21 Viewer

Chrome extension by bibliotekarien.se · Productivity · Tools

A Chrome extension in Productivity · Tools with 109 users, barely installed. Audience over the last 30 days: +19.

Specific sites only: 1 match pattern.

What the developer says, and 3 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
109
Rating
not rated yet
Users, last 30 days
+19
Version
1.2.0
Updated in the store
2026-04-23
Published
2026-04-20
Manifest
V3
Browser access
2 permissions, 1 site pattern

How it has moved

Users
+19 since 09.10
90-110 · 19 readings
  1. 2026-10-0990
  2. 2026-10-1095
  3. 2026-10-1396
  4. 2026-10-16101
  5. 2026-10-1799
  6. 2026-10-18100
  7. 2026-10-1999
  8. 2026-10-2098
  9. 2026-10-2199
  10. 2026-10-22100
  11. 2026-10-2399
  12. 2026-10-24100
  13. 2026-10-26101
  14. 2026-10-28104
  15. 2026-10-29106
  16. 2026-11-02108
  17. 2026-11-04107
  18. 2026-11-06110
  19. 2026-11-07109
Users
+26 since 01.09
79-110 · 35 readings
  1. 2026-09-0183
  2. 2026-09-0281
  3. 2026-09-0484
  4. 2026-09-0583
  5. 2026-09-0779
  6. 2026-09-0882
  7. 2026-09-1083
  8. 2026-09-1384
  9. 2026-09-1588
  10. 2026-09-1786
  11. 2026-09-2087
  12. 2026-09-2286
  13. 2026-09-2587
  14. 2026-09-2691
  15. 2026-10-0494
  16. 2026-10-0893
  17. 2026-10-0990
  18. 2026-10-1095
  19. 2026-10-1396
  20. 2026-10-16101
  21. 2026-10-1799
  22. 2026-10-18100
  23. 2026-10-1999
  24. 2026-10-2098
  25. 2026-10-2199
  26. 2026-10-22100
  27. 2026-10-2399
  28. 2026-10-24100
  29. 2026-10-26101
  30. 2026-10-28104
  31. 2026-10-29106
  32. 2026-11-02108
  33. 2026-11-04107
  34. 2026-11-06110
  35. 2026-11-07109

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 1 match pattern.

  • *://libris.kb.se/*

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

bibliotekarien.se.

Like this one

Listings the catalog judges closest in what they say they do.

  1. MARC Viewer X Describes nearly the same job, smaller audience 7 users
  2. Koha MARC Helper Describes nearly the same job, smaller audience 34 users ★ 5.0
  3. Primo Catalog Search Describes nearly the same job, smaller audience 8 users ★ 2.0
  4. CSN Library Search Plugin Describes a similar job, smaller audience 24 users
  5. N.C. State Library GOBI Linky Describes a similar job, smaller audience 7 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Users and rating on Ext Ops Panel

Markdown

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HTML

<a href="https://extops.dev/extensions/dpabfnjonaacacmppffchekggonkpild"><img src="https://extops.dev/extensions/dpabfnjonaacacmppffchekggonkpild/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-07. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built