donjon

Overview

donjon is a legendary, minimalist suite of web-based procedural generators that has served as the "Swiss Army Knife" for Game Masters since its first dungeon generator went live in 1999. Created and maintained by a developer known as drow, the site eschews modern flashy graphics and subscriptions in favor of raw utility and speed. In late 2025 and 2026, the site saw a significant "5.5 Refactor," adding full support for the 2024 D&D Core Rules, including new treasure tables, encounter calculators, and Bastion event generators. Description donjon is the ultimate tool for the "Zero-Prep" GM. It is a collection of text and image-based algorithms that can generate everything from a single NPC to an entire star system in less than a second. While newer tools focus on 3D visuals, donjon remains a favorite because it is incredibly lightweight; it loads instantly on any device and provides high-density information without any clutter. It is the "source code" of many GMs' campaigns, providing the mechanical backbone for loot, encounters, and world-building data. System Overview & Key Features
Random Dungeon Generator The crown jewel of the site. It creates fully mapped-out dungeons with "old-school" aesthetics. You can specify the level, layout, and "dungeon motif" (like Sunken Temple or Abyssal Rift), and it will populate the map with traps, secret doors, wandering monsters, and room descriptions automatically.
D&D 5.5 / 2024 Core Support New for 2026, the site features a dedicated "5.5" section. This includes an updated Encounter Size Calculator that accounts for the 2024 power scaling, as well as a Magic Shop Generator that utilizes the new pricing and item rarity structures introduced in the latest D&D revision.
Fractal World Generator This tool uses a recursive algorithm to generate entire world maps with realistic coastlines, islands, and tectonic-like features. GMs can adjust the "Ice Limit," "Water Percentage," and "Scale" to create a unique continent or a planet-wide archipelago in seconds.
Sci-Fi and Weird Fiction Suites Beyond fantasy, donjon is the premier source for Star Wars (d6/d20) and Traveller star system generators. It also features a Weird Fiction section for Call of Cthulhu players, generating eldritch tomes, blasphemous rituals, and sanity-testing NPCs.
The "Endless Oubliette" For GMs running "Megadungeons," this tool uses Dyson Logos-style geomorphs to generate an infinitely expanding dungeon. As players move through the map, the GM can keep generating new sections, ensuring the dungeon literally never ends.
HTML and TSV Exports Almost every generator on the site allows you to export results as a raw text file or a portable HTML page. This is essential for GMs who want to copy-paste generated NPCs directly into Discord or import loot tables into Foundry VTT or Obsidian.
Additional links donjon.bin.sh https://donjon.bin.sh - Official donjon website and site index

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Update log - September 2026 "Support us"
Update log

Update log - September 2026 "Support us"

As we step away from the summer months, we find ourselves more at our tables. Tables for playing and also working on features and fixes for Groupfinder. And there have been quite a few additions since our last Update log. We'll go over some of the bigger changes and additions. Supporters /images/general-media/1789388957_fqCygV2e.png Some of you may have noticed in the menu dropdown a little page called Subscribe. Worry not, this does not mean, that Groupfinder is going to be pay to use. No, far from it. We are sticking by what we have been saying since the start - Groupfinder will remain free to use. Becoming a subscriber is your way of supporting our ongoing work on the platform. To make sure the lights stay on, the servers buzzing and the licenses get paid, we have to make sure all those costs don't overwhelm us. What does it mean to be a subscriber? As a thank you, for your help and trust in us, your account will have some ease of life perks: Automatic bumping - you can set up automatic bumping for your posts, helping your post stay refreshed. Once you set it up, every 48 hours, the system will bump your post moving it back to the top of the listings. Customized notifications - want to only receive specific notifications and alerts for games and players in a specific region and game system? You can set your specific rules for custom alerts. Colour themes for your posts - Feel a little red? Green? blue? Customize your posts with the colour theme you prefer, make your post stand out with a little cosmetic tweak.  More cover pictures - Supporters will also find that they have access to a whole new set of cover images to choose from. If you are tired of the ones you have seen so far - you will find more from the selection we present the subscribers. Higher limits - If you have more than two games you are looking players for - you will be able to have up to six different active game posts at once. You will also be allowed to send more messages to new users every day. Attach files - perhaps your games have a world map you'd like to show off to make players more interested in it - you can add some files to your post and make it more informative. And various limit increases and customization options for Group Manager and for those who manage a library entry page. You can read more about the subscription here. And if you don't care about those perks - but you think we are doing a neat job - that can be your motivation as well. Messenger On desktop devices, you will find our messenger in the bottom right corner of the page, allowing you to chat with others in a more intuitive manner, just like you may be used to on various other platforms. We will continue to improve the messaging experience as we go forward, but we are very happy with the way it is now. Ofcourse you can continue using messenger, how it was before, as a full-page view. Tiles for Group Manager /images/general-media/1789389492_W7MfXXwR.png In addition to various improvements for the Group Manager, we are happy to announce tiles.  Tiles are small customizeable and editable dynamic elements, that you can add to your Group Manager dashboard to add various features to them.  Add images, spell, item, skill lookup searches, connect your notes to your Obsidian markdown files and keep them synced with what you have on your computer or just add a slideshow to set the mood for the game. Badges /images/general-media/1789389332_qdibSnHO.png Show off your activity and achievements on Groupfinder with the badges you have earned here. There are various ways to earn badges, some you get for reaching out to users on the platform, some you get for bumping. You may be considered a librarian, if you help us improve the library.  And with higher tier badges, you will also unlock unique perks (such as lower daily bumping cooldown, or additional unique cover images). Posts and listings We also took some time to optimize the filtering options on the posts pages. We added additional features to the search, and with that it slowly started getting out of hand. So it was time to take a step back and look at the whole listings filter as a whole and bring it all together, again. Many of these fixes and tweaks have been things you, the users, have asked for. Just like the option to also exclude tags from your search. Don't want to see games that have a "Horror" theme? Take it out and no spooky season for you. We admit that for some time the "Create a post" flow was.. messy. Again the same deal, as with filters - we added fields, elements, options and much more to it. But it resulted in the pages being overly cluttered and some fields may have been accidentally overlooked. Now the flows have been reworked and should make it a lot easier for you to create your player post or add your games to the listings. Also to all of our multilingual friends - you can now write your post description in multiple languages. I mean.. you could also before - but now it is more reasonably separated and structured. Those with a game post will also have access to more detailed analytics about your post. Knowing and understanding more about those, who open your post, can help you tweak and tailor your post in various ways. A more organized library /images/general-media/1789390627_QjshwGXo.png Don't you just hate it when your local library is a mess. Well ours was a bit messy - so we cleaned it up and made it make more sense. The new library home page now offers you a better overview of what is new, what is popular and which events are upcoming. Speaking of events - if you know of any upcoming tabletop events that might interest others - tell us about them and we'll try to get those added to the library as well. And much, much more In addition to all the topics we've covered here, there have been a vast amount of additional changes - not necessarily smaller and less important. We just have to keep these update logs at a reasonable length. If you have any feedback regarding these changes (or lack of an update you were hoping for) - do let us know. Either use the contact us form, or join our Discord server and let us know there. We are always happy to discuss and learn from you. Till next time.

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Codex
Tools & Platforms

Codex

English
Spanish
Character sheets
Codex is a browser-based character sheet and encounter tracker for d20 games using the 3.5 SRD, published under the Open Game License v1.0a. It runs as a progressive web app: it installs on a phone like a native app, works with no connection, and pushes any pending changes once the network returns. The design goal is that the sheet does the arithmetic a table normally does by hand. Underneath the interface sits a full implementation of the 3.5 ruleset - typed bonus stacking, iterative base attack bonuses, multiclassing, spell slots derived per ability score, two-weapon fighting, armour check penalties, encumbrance, size modifiers and confirmable criticals - rather than a set of fields the player has to total up. Every value on the sheet is derived, and clicking any ability, save, skill or weapon rolls it with the correct modifier already applied. Codex also checks the character against the rules and says so when something does not add up. If a sheet ends up with more skill ranks than the character's level allows, more feats than available slots, spells prepared that the caster can no longer cast, a cleric missing his two domains or a paladin who has stopped being Lawful Good, the sheet reports it and links to the tab where it is fixed. It never edits the character on its own - the correction is always the player's decision. The Encounter tab turns the same engine into a combat tracker: initiative order, a bestiary of 466 SRD creatures, per-combatant conditions, a battle grid with flanking, reach and range increments, and an encounter difficulty estimator. Encounters can be run solo or as a shared room, where a server validates every action rather than trusting the client. Characters can be built by hand or generated. Thirty-two archetype templates - twenty of them multiclass - produce a complete, rules-legal character at any level, with equipment bought from the wealth the SRD grants for that level and restricted to what the character is actually proficient with. Codex is bilingual (English and Spanish), free to use, and requires no installation or account to try.

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Saga Voices
Tools & Platforms

Saga Voices

English
Polish
Daggerheart
Saga Voices is a web and Android app for Game Masters who build and run interactive audio scenarios at the table. Design a branching story on a visual canvas, attach narration, and play it live as the party makes choices.  With support for D&D, Call of Cthulhu, and Daggerheart.

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