Right now I couldn't find what best npm package to use for my online tools that can work with my API routes implementation on Next.js

My app is hosted on Vercel, popular packages on npm are using GhostScript—but I think this is complicated because I prefer serverless that doesn't require me to deploy something on VPS.

Already tried pdf-lib, but I think it's not my case—it work well with my edit PDF tool like merge PDF, delete PDF, but not with compress PDF.

Any thoughts about this?