Basic Pitch, a free audio-to-MIDI converter with pitch bend detection, built by Spotify.
Basic Pitch is a Python library for Automatic Music Transcription (AMT), using lightweight neural network developed by Spotify's Audio Intelligence Lab.

Basic Pitch @ GitHub

A Simple Image To SVG Vector Converter

GitHub repository: https://github.com/wwebdev/convert2svg

Open big JSON, CSV Files: Online Viewer, Explorer and Converter.
View and convert big data files.
View large or small files right in your browser and export them in any format.

A Docker-powered stateless API for PDF files.
Gotenberg provides a developer-friendly API to interact with powerful tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more.

• Gotenberg @ GitHub.
• How to Simply Generate a PDF From HTML in Symfony With WeasyPrint @ Theodo.

Curlew is an easy to use, Free and Open-Source Multimedia converter for Linux.

CloudConvert supports the conversion between more than 100 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats. You can specify advanced options for every conversion type. Check the supported formats for more details.