nreljin

A lightweight tool to move content between WordPress sites with precision.
Features 
– Export a single post or page to JSON (includes meta, terms, and revisions) 
– Import a previously exported JSON to recreate the post on another site 
– Works with all public post types; sets current user as the author on import 
– Adds an Export action in Posts/Pages list rows 
– Adds Tools → Post Import with a file upload form 
– Robust UTF-8 handling: exports HTML‑entity encode content/meta; imports decode to avoid double‑encoding
Perfect for 
– Migrating content between environments 
– Duplicating complex posts across sites 
– Archiving rich post data including revision history

NR Post Exporter

Export/import individual posts with meta, terms, and revisions. Adds Export row action and Import screen.

David Miller

Revision Diet is a plugin to limit the number of post revisions that are saved. It does exactly what you expect – it allows you to set a number of revisions to keep for each post and deletes any revisions beyond that number. This number will not include the autosave revisions.
The options page is extremely simple – enter the number of revisions to keep and save your options. There is also a button to ?Trim Excess Revisions.? This button will trim all the extra revisions from every post in your WordPress installation. (Using it is optional.) As for regular use, each time you save a post the oldest revisions on that post will be deleted from the database down to the limit that is currently set.

Revision Diet

Revision Diet is a plugin to limit the number of post revisions that are saved.

NR Post Exporter vs Revision Diet