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

Hundreds of brilliant D&D adventures are sitting in PDFs because they were written for editions nobody runs anymore. We built a free tool so they don't have to stay there.

The problem: great adventures, incompatible rules

If you've been a GM for any amount of time, you've heard of Keep on the Borderlands, Tomb of Horrors, Red Hand of Doom, Ravenloft. These adventures are legendary for a reason. They're some of the best tabletop content ever written.

And most of them are unplayable as-is on a 5e table. A goblin with THAC0 20 and descending AC 6 means nothing to your players. The saves are categorized differently, the spell lists don't match, the treasure tables point at systems that don't exist anymore. The stat block format is alien.

Converting it by hand is tedious. For every monster, you look up the 5e equivalent, recalculate AC, translate saves, adjust damage for bounded accuracy, reformat the block. A 30-page module eats hours of prep before you can even start reading it as a GM.

The solution: AI-powered automatic conversion

We're releasing the D&D Edition Converter today, a free tool that does the conversion for you. Upload any pre-5e D&D adventure (AD&D 1e through 4e), and the AI agent rewrites every stat block, encounter, trap, save, and skill check into 5e.

Under the hood:

• Reads your PDF. OCR pulls every page into searchable text, including 1980s modules scanned at the school photocopier.
• Detects the source edition. The agent works out whether it's looking at THAC0, Fort/Ref/Will, or 4e power cards.
• Converts section by section. Each chapter, room, and encounter gets handled individually. Where the creature exists in the 5e SRD or Monster Manual, the official stat block is what comes back.
• Preserves the narrative. Read-aloud, NPC descriptions, location flavor, plot hooks all pass through untouched. Only the mechanics get rewritten.
• Flags uncertainties. When a conversion is ambiguous, the agent leaves a [CONVERTER NOTE] so you can make the 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

1. Go to lorepanic.com/converter
2. Upload your adventure PDF (up to 50 MB)
3. Wait for the OCR to process (you'll see a progress bar)
4. Click "Convert to D&D 5e" and watch the agent work section by section
5. 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 newest addition to the LorePanic toolkit. The other things it does, if you're curious:

• Instant book search. Upload any RPG PDF, search across the lot in milliseconds.
• AI campaign agent. Chat with an AI that has actually read every document in your campaign.
• Live session transcription. Record sessions, get real-time transcripts and smart suggestions while you play.

All free to try. Sign up and tell us what breaks.