yomorun/hashids-java

Health v2 · maintenance only

Adoption not part of the score

1027 stars · 153 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A small Java library implementing the Hashids algorithm (v1.0.0) to generate short, unique, decodable, URL-safe hashes from one or more non-negative integers. It is a port of the JavaScript hashids.js library, published to Maven Central as org.hashids.

Use cases

• generate YouTube-like short IDs from database primary keys
• shorten URLs with unguessable identifiers
• encode multiple integers into a single decodable hash
• hide sequential numeric IDs in public URLs
• generate profanity-free URL-safe confirmation codes
• encode and decode IDs on the fly without storing them in the database

When to choose

• you need reversible, decodable short IDs from non-negative integers in a Java or Android project
• you want URL-safe identifiers that avoid curse words
• you need to encode several numbers into one hash for clustered systems
• you want a tiny MIT-licensed library available on Maven Central

When to avoid

• you need to protect sensitive data - hashids is not encryption and can be decoded
• you want to hide user counts or other statistics that IDs could reveal
• you are starting a new project and prefer the newer Sqids algorithm that replaced Hashids
• you need cryptographically secure tokens or authentication credentials

Facets

library · maturity maintenance

serialization developer-tools developer-tools web-development jvm hashids short-ids url-safe-ids encoding decoding obfuscation algorithms android

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