Your Favorite Classic D&D Adventures Deserve a Second Life in 5e

There are hundreds of incredible D&D adventures gathering dust because they were written for editions nobody plays anymore. We built a free tool to change that.

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The problem: great adventures, incompatible rules

If you've been a Game Master for any amount of time, you've probably heard of — or played — classics like Keep on the Borderlands, Tomb of Horrors, Red Hand of Doom, or Ravenloft. These adventures are legendary for good reason: their design, their atmosphere, their encounters — they're some of the best tabletop RPG content ever made.

But most of them are unplayable with modern D&D 5e rules. A goblin with THAC0 20 and descending AC 6 doesn't mean anything to a table running 5th Edition. The saving throw categories are different. The spell lists don't match. The treasure tables reference systems that no longer exist. The stat blocks are in a completely foreign format.

Converting manually is tedious. For every monster in every encounter, you need to look up the 5e equivalent, recalculate AC, translate saving throws, adjust damage for bounded accuracy, and reformat the stat block. A 30-page adventure can take hours of prep work before you can even begin to run it.

The solution: AI-powered automatic conversion

Today we're releasing the D&D Edition Converter, a free tool that does all of this automatically. Upload a PDF of any old D&D adventure — from AD&D 1st Edition all the way through 4th Edition — and our AI agent converts every stat block, encounter, trap, saving throw, and skill check to D&D 5e.

Here's what it does:

Reads your PDF — OCR extracts every page into searchable text, even from scanned copies of 1980s modules.

Detects the source edition — The agent figures out whether your adventure uses THAC0, Fort/Ref/Will saves, or 4e power cards.

Converts section by section — Every chapter, every room, every encounter gets processed individually. The agent searches the official 5e SRD and Monster Manual for equivalent creatures and uses official stat blocks wherever possible.

Preserves the narrative — Read-aloud text, NPC descriptions, location flavor, plot hooks — all preserved exactly as written. Only game mechanics get converted.

Flags uncertainties — When a conversion is ambiguous, the agent marks it with a [CONVERTER NOTE] so you can make the final call as the DM.

What gets converted, exactly?

The conversion handles all the mechanical differences between editions:

AD&D / 2nd Edition → 5e

THAC0 → attack bonus (THAC0 16 becomes +4 to hit)

Descending AC → ascending AC (AC 5 becomes AC 15)

Five saving throw categories → six ability-based saves

Hit Dice → Challenge Rating with XP

Treasure types → 5e treasure hoard tables

Morale scores removed, noted as DM guidance where relevant

3rd Edition / 3.5e → 5e

AC and attack bonuses adjusted for bounded accuracy

Dozens of skills consolidated (Spot + Listen → Perception, Hide + Move Silently → Stealth)

Fort/Ref/Will → Constitution/Dexterity/Wisdom saves

Magic item counts reduced to match 5e's lower-magic economy

Feats replaced with 5e equivalents or noted as removed

4th Edition → 5e

At-will/encounter/daily powers → cantrips, short rest, and long rest abilities

Minion/Standard/Elite/Solo creatures → appropriate CR with legendary actions for bosses

Healing surges → hit dice

Skill challenges → structured ability check sequences

4e's aggressive damage scaling adjusted down

How to use it

Go to lorepanic.com/converter

Upload your adventure PDF (up to 50 MB)

Wait for the OCR to process (you'll see a progress bar)

Click "Convert to D&D 5e" and watch the agent work section by section

Download the converted markdown when it's done

You get 1 free conversion per day without an account. Create a free LorePanic account for 10 conversions per day.

What's next?

The converter is the latest addition to the LorePanic toolkit. If you're a GM who wants to get more out of your adventure books, check out our other features:

Instant book search — Upload any RPG PDF and search across all your documents in milliseconds

AI campaign agent — Chat with an AI that has read every document in your campaign

Live session transcription — Record sessions and get real-time transcription with smart suggestions

All free to try. Sign up here and let us know what you think.

About us

LorePanic is an AI-powered companion for tabletop RPG Game Masters that instantly searches your adventure books, rulebooks, and campaign notes so you never have to flip through pages mid-session. It records your games with live transcription, surfaces contextual suggestions as the story unfolds, and generates automatic session recaps — letting you prep less and run more memorable games. Whether you're running D&D, Pathfinder, or homebrew, LorePanic keeps your entire campaign's lore one question away.

https://lorepanic.com/