What Is the D&D SRD? Free Rules Explained

If you've ever tried to look up a D&D rule online and stumbled into a maze of "is this legal to share?" conversations, you've brushed up against the SRD. It stands for System Reference Document, and it's the reason free D&D tools, apps, and communities can exist without Wizards of the Coast's lawyers showing up uninvited.

Here's what it actually is, what's in it, what's conspicuously not in it, and why it matters for anyone who plays (or builds things for) D&D 5th Edition.

The Short Version

The SRD is a free, officially released document containing a large subset of the D&D 5e rules. Wizards of the Coast published it so that third-party creators, app developers, and community projects can reference and build upon the core mechanics of the game without needing a licensing deal.

Think of it like this: D&D is a massive buffet. The SRD is the "free samples" table. It's generous, it's filling, and you can absolutely have a complete meal from it. But the restaurant would still like you to buy the full spread.

A Brief History of Open D&D

The concept of an open-access D&D ruleset isn't new. Back in 2000, Wizards of the Coast released the original SRD alongside the Open Gaming License (OGL) for D&D 3rd Edition. This was a genuinely radical move for the tabletop industry. It spawned an entire ecosystem of third-party supplements, settings, and systems (hello, Pathfinder).

For 5th Edition, the SRD was released in 2016 and updated periodically. Then, in early 2023, after a rather dramatic community uproar about proposed OGL changes (you may remember the internet catching fire for a few weeks), Wizards of the Coast made a landmark decision: they released the 5.1 SRD under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

This is a big deal. Creative Commons is a well-understood, irrevocable license. It means the content in the SRD 5.1 is free. Permanently. No take-backsies. Wizards of the Coast cannot change their mind about this one, which is exactly why the community pushed for it.

What's Actually in the SRD?

More than you might expect. The SRD 5.1 covers the core mechanical framework of D&D 5e in substantial detail.

Races (Species)

The SRD includes a set of playable races with full stat blocks, traits, and subraces:

• Dwarf (Hill Dwarf subrace)
• Elf (High Elf subrace)
• Halfling (Lightfoot subrace)
• Human
• Dragonborn
• Gnome (Rock Gnome subrace)
• Half-Elf
• Half-Orc
• Tiefling

Notice a pattern? You get one subrace per race. The others (like Wood Elf, Mountain Dwarf, or Stout Halfling) live in the Player's Handbook and aren't part of the SRD.

Classes

All 12 core classes are represented, each with one subclass:

| Class | SRD Subclass | |-------|-------------| | Barbarian | Path of the Berserker | | Bard | College of Lore | | Cleric | Life Domain | | Druid | Circle of the Land | | Fighter | Champion | | Monk | Way of the Open Hand | | Paladin | Oath of Devotion | | Ranger | Hunter | | Rogue | Thief | | Sorcerer | Draconic Bloodline | | Warlock | The Fiend | | Wizard | School of Evocation |

Again, one subclass each. If you want to play an Assassin Rogue or a Totem Warrior Barbarian, those live behind the paywall. But the base class features, progression tables, spell lists, and core mechanics are all here.

Spells

This is where the SRD really shines. It includes over 340 spells spanning every spell list in the game. Cantrips through 9th level. That's the vast majority of the Player's Handbook spell list, and it's enough to run a full campaign without ever feeling limited.

For a full breakdown of what's available, check out our complete spell list breakdown.

Monsters

The SRD contains stat blocks for hundreds of monsters, from the humble Commoner (CR 0, the monster that is literally just a person) to the terrifying Tarrasque (CR 30, the monster that eats cities). Most of the iconic D&D creatures are represented: dragons, beholders, mind flayers, owlbears, mimics, and the gelatinous cube (everyone's favorite transparent death Jell-O).

Equipment and Items

You get the full equipment tables: weapons, armor, adventuring gear, tools, and mounts. Magic items are also well represented, including classics like the Bag of Holding, Flame Tongue, and various +1/+2/+3 weapons and armor.

Core Rules

This is the real backbone. The SRD covers:

• Ability Scores and Modifiers (the d20 system fundamentals)
• Skills and Proficiency (how checks work)
• Combat Rules (initiative, actions, movement, opportunity attacks, conditions)
• Spellcasting Mechanics (concentration, components, spell slots, ritual casting)
• Adventuring (resting, travel, environment hazards)
• Character Advancement (XP, leveling, multiclassing)
• Conditions (all standard conditions like Stunned, Frightened, Prone, etc.)

If you're looking for a solid reference on how combat actually works with all these rules, we wrote a full combat rules guide that covers the nitty-gritty.

What's NOT in the SRD?

Here's where things get interesting. The SRD is generous, but it's also strategic about what it withholds.

Most Subclasses

As noted above, each class gets exactly one subclass. That means popular options like the Battlemaster Fighter, the Divination Wizard, the Oath of the Ancients Paladin, and the Circle of the Moon Druid are all absent. This is probably the most impactful omission for players.

Most Subrace Options

Same deal. One subrace per race. Want to be a Drow? Not in the SRD.

Feats

The SRD includes a very limited selection of feats. Many beloved options (Sharpshooter, Great Weapon Master, Lucky, Sentinel) are not included. This is a notable gap for character optimization.

Backgrounds with Unique Features

The SRD includes the basic background framework and a handful of backgrounds, but many of the more flavorful ones from the PHB are absent.

Setting-Specific Content

Anything tied to a specific D&D setting (Forgotten Realms lore, Eberron, Ravenloft, etc.) is not in the SRD. The SRD is setting-agnostic by design.

Published Adventures

No adventure modules, campaign books, or pre-written scenarios are included. The SRD gives you the engine; the road trips are sold separately.

The Creative Commons License, Explained

The CC BY 4.0 license is beautifully simple compared to the old OGL. Here's what it means in practice:

You CAN:

• Use, share, and redistribute SRD content freely
• Build commercial products using SRD content
• Modify and adapt the material however you want
• Use it in apps, websites, games, videos, and anything else

You MUST:

• Give appropriate credit to Wizards of the Coast
• Indicate if you made changes to the original material
• Not suggest that Wizards of the Coast endorses your work

You CANNOT:

• Add additional legal restrictions on top of the CC license
• Claim the SRD content as your own original creation

That's basically it. No royalty payments, no registration process, no approval needed. You credit Wizards of the Coast, and you're good.

Why the SRD Matters for Digital D&D

The SRD is the reason tools like The Endlessness can exist. When you're building an AI-powered Dungeon Master, you need a legitimate, thorough rules foundation. The SRD provides exactly that: a complete mechanical framework that can be implemented faithfully without legal ambiguity.

This means every spell slot tracked, every ability check resolved, every combat round adjudicated in The Endlessness is built on the same official rules foundation as your table game. The AI isn't making up its own version of D&D. It's running the real thing, using the rules that Wizards of the Coast explicitly made available for this purpose.

For character creation specifically, the SRD gives you a solid roster to work with: 9 races, 12 classes, and enough mechanical depth to build genuinely diverse characters. If you're curious about the full process, our character creation guide walks through it step by step.

SRD vs. Basic Rules vs. Player's Handbook

People sometimes confuse these three, so here's the difference:

| | SRD 5.1 | Basic Rules | Player's Handbook | |---|---------|-------------|-------------------| | Purpose | Third-party creation | New player onboarding | Complete player reference | | Classes | 12 (one subclass each) | 4 (one subclass each) | 12 (3-4 subclasses each) | | Races | 9 | 4 | 9 | | Spells | 340+ | ~100 | 360+ | | Monsters | Hundreds | ~150 | N/A (Monster Manual) | | Cost | Free (CC BY 4.0) | Free | ~$50 | | License | Creative Commons | Personal use | Personal use |

The SRD is actually more complete than the Basic Rules in most categories. It's the most complete free D&D resource available, and unlike the Basic Rules, its open license means it can be legally integrated into third-party tools and products.

How to Access the SRD

You have several options:

1. Direct PDF: Wizards of the Coast hosts the official SRD 5.1 PDF on their website. It's a single document, roughly 400 pages.
2. Online References: Sites like 5e.tools and the D&D 5e SRD website present the content in searchable, hyperlinked formats. Much more user-friendly than a giant PDF.
3. Built into Tools: Many digital D&D platforms (including The Endlessness) have the SRD content baked directly into their systems, so you're using it without even needing to look anything up.

Common Misconceptions

"The SRD is all of D&D." It's not. It's a big chunk, but the full game across all sourcebooks is vastly larger.

"If it's not in the SRD, it's not official." The SRD is a subset of official content. Everything in the SRD is official, but lots of official content isn't in the SRD.

"The SRD is only for publishers." Nope. Anyone can use it. Players, DMs, homebrewers, app developers, content creators. The Creative Commons license makes no distinction.

"Using the SRD means playing a lesser version of D&D." Honestly? Not really. The SRD covers so much ground that you can run a full campaign, from level 1 to 20, with plenty of variety. You'll miss some subclass options and feats, but the core experience is fully intact.

The Bottom Line

The SRD 5.1 is one of the best things to happen to the D&D community. It's a thorough, legally free, permanently available foundation for the game. Players, DMs, homebrewers, developers, and anyone who wants to learn how D&D works without spending money will find what they need here.

It's not the entire game, but it's a remarkably complete version of it. And thanks to the Creative Commons license, it's not going anywhere.

Now go roll some dice. Preferably with the rules open in another tab, because nobody actually memorizes all of them. Not even the DM. Especially not the DM.