> ## Documentation Index
> Fetch the complete documentation index at: https://docs.htmldrop.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Concepts

> Drops, versions, slugs, and the difference between anonymous, free and paid.

## Drop

A drop is one published thing at one URL. It might be a single HTML file or a
whole folder — either way it is one entry in your dashboard and one address.

## Slug

The subdomain a drop is served from: `slug.htmldrop.app`. Anonymous drops get a
random slug. With an account you can choose one (3–63 characters, lowercase
letters, numbers and hyphens), and on a paid plan you can put the drop on your
own domain instead.

## Version

Every upload to an existing drop creates a version. The newest is live; older
ones stay retrievable so you can [roll back](/publishing/updating-and-rollback).
How many are kept depends on your plan — 3 on free, 10 on Plus, 30 on Business.

## The three states an account can be in

|                         | Anonymous     | Free account                                                       | Paid                              |
| ----------------------- | ------------- | ------------------------------------------------------------------ | --------------------------------- |
| Signup needed           | No            | Yes                                                                | Yes                               |
| Drop lifetime           | 7 days, fixed | Live while you're active — a 30-day clock that each sign-in resets | Permanent                         |
| Max upload              | 2 MB          | 10 MB                                                              | 100 MB (Plus) / 500 MB (Business) |
| Folders and `.zip`      | No            | Yes                                                                | Yes                               |
| Custom domain, password | No            | No                                                                 | Yes                               |

Anonymous drops made in a browser are **claimed automatically** when you sign up
from that same browser — you do not have to re-upload anything.