What is Sqids?
Sqids (pronounced "squids") is an open-source library that lets you generate short unique identifiers from numbers. These IDs are URL-safe, can encode several numbers, and do not contain common profanity words. Read more.
This is what they look like:
https://example.com/Lqj8a0
Quick encode & decode example:
var
Id: string;
Numbers: TNumbers;
begin
with TSqids.Create do
try
Id := Encode([1, 2, 3]); // '86Rf07'
Numbers := Decode(Id); // [1, 2, 3]
finally
Free;
end;
end;If IDs are too short, you can pad them to a certain length:
var
Id: string;
Numbers: TNumbers;
begin
with TSqids.Create(10) do
try
Id := Encode([1, 2, 3]); // '86Rf07xd4z'
Numbers := Decode(Id); // [1, 2, 3]
finally
Free;
end;
end;Create unique IDs by shuffling the alphabet:
var
Id: string;
Numbers: TNumbers;
begin
with TSqids.Create('k3G7QAe51FCsPW92uEOyq4Bg6Sp8YzVTmnU0liwDdHXLajZrfxNhobJIRcMvKt') do
try
Id := Encode([1, 2, 3]); // 'XRKUdQ'
Numbers := Decode(Id); // [1, 2, 3]
finally
Free;
end;
end;Full documentation is at https://github.com/sqids/sqids-pascal
Use Cases
The main use of Sqids is purely visual. If you'd like to use IDs instead of numbers in your project, Sqids could be a good choice.
Good For
- Encoding primary keys If you're using a relational database
- Saving database lookups By encoding multiple objects
- Temporary login tokens Profanity-free and URL-safe
Not Good For
- Sensitive data This is not an encryption library
- User IDs Can reveal user count if anyone finds out the encoding alphabet
Features
- 🆔 Generate short IDs from non-negative numbers
- ✅ Easy encoding & decoding
- 🫣 Auto-generated IDs do not contain common profanity
- 🎲 Support for custom IDs through shuffled alphabet
- 🥳 44 integrations
- 📌 Every version produces the same IDs
- 🍻 Small library with a permissive license
