Sqids Lua

Sqids (pronounced "squids") is a small library that lets you generate YouTube-looking IDs from numbers. It's good for link shortening, fast & URL-safe ID generation and decoding back into numbers for quicker database lookups.

Features:

• Encode multiple numbers - generate short IDs from one or several non-negative numbers
• Quick decoding - easily decode IDs back into numbers
• Unique IDs - generate unique IDs by shuffling the alphabet once
• ID padding - provide minimum length to make IDs more uniform
• URL safe - auto-generated IDs do not contain common profanity
• Randomized output - Sequential input provides nonconsecutive IDs
• Many implementations - Support for 40+ programming languages

🧰 Use-cases

Good for:

• Generating IDs for public URLs (eg: link shortening)
• Generating IDs for internal systems (eg: event tracking)
• Decoding for quicker database lookups (eg: by primary keys)

Not good for:

• Sensitive data (this is not an encryption library)
• User IDs (can be decoded revealing user count)

🚀 Getting started

Sqids is available on LuaRocks:

luarocks install sqids-lua

👩‍💻 Examples

local Sqids = require("sqids")
local sqids = Sqids.new()

local encoded = sqids:encode({ 1, 2, 3 }) -- 86Rf07
local decoded = sqids:decode(encoded) -- 1, 2, 3

Enforce a minimum length for IDs:

local Sqids = require("sqids")
local sqids = Sqids.new({
    minLength = 10,
})

local id = sqids:encode({ 1, 2, 3 }) -- 86Rf07xd4z
local numbers = sqids:decode(id) -- [1, 2, 3]

📝 License

MIT