Golang PDF library for creating and processing PDF files (pure go)

Free open-source web software for signing PDF (alone or with others) and also organize pages, edit metadata and compress pdf

GoPDFSuit - Ultra Fast PDF Engine (Gin Web + gopdflib +pypdfsuit)

Dinky makes files smaller.

Collected Alfred Workflows & Proof of Concept

Fast in-browser PDF compressor

The best open-source, Windows PDF Compressor GUI, with an advanced compression algorithm using top-of-the-line open-source compression tools like Ghostscript, Pikepdf, pngquant, etc.

iLovePDF Rest Api - PHP Library (https://developer.ilovepdf.com)

Fast PDF generation and compression. Deals with millions of pages daily.

A GTK+ GUI Application written in Python that simplifies compressing PDF files with Ghostscript

A script to simplify compressing PDF file size with GhostScript

Sample code for the Datalogics C++, Java, and .NET interfaces of the Adobe PDF Library

C# and VB.NET samples for Docotic.Pdf library

The web app is a PDF processing tool that runs entirely in browser using Ghostscript WebAssembly. It provides the main features: compress, merge and split pdf files.

The privacy-first, client-side PDF toolkit. Compress, Merge, Split, Reorder and Convert PDFs entirely in your browser without server uploads.

Basic try to copy iLovePDF – testing features like PDF conversion, merge/split tools, and a resume builder.

pdfRest API Toolkit is a REST API service for processing PDF documents, made by developers, for developers. Rapidly integrate PDF workflows with your existing projects and applications, simply and seamlessly. Get started for free in seconds.

The Best Open Source PDF Compression Engine

A fast, single-binary CLI tool for common PDF operations

Simple GUI tool to reduce PDF file sizes using Ghostscript