FreeConvert GIF Maker vs libvips

FreeConvert GIF Maker creates animated GIFs from uploaded images in a web browser. It supports JPG, PNG, WebP, and HEIC files, which users can choose from Dropbox, Google Drive, or OneDrive, or provide through a URL. The editor lets users order frames, set delays and loop count, choose GIF width, and add crossfades. Per-image controls include margins, skipping, and duplication; output options cover alignment, trimming, fill color, frame stacking, and compression. Finished GIFs can be downloaded or saved to Google Drive, OneDrive, or Dropbox; mobile users can download through a QR code. The maker page displays a 1 GB maximum file size and prompts users to upgrade for more. The free plan includes 20 conversion minutes per day, a five-minute-per-file limit, and up to 20 files per day. Paid plans start at $12.99 a month. FreeConvert says uploads use SSL encryption and created files are automatically deleted after eight hours. The maker works in modern Windows, Mac, iOS, and Android browsers; no desktop application is listed.

libvips is an image-processing library built for demand-driven work across multiple threads, with low memory use. Its roughly 300 operations cover arithmetic, histograms, convolution, morphology, frequency filtering, colour, resampling and statistics. It handles formats including JPEG, JPEG 2000, JPEG XL, TIFF, PNG, WebP, HEIC, AVIF, FITS, Matlab, OpenEXR, PDF, SVG, GIF, DeepZoom and OpenSlide. Developers can use C, C++, command-line tools, or bindings for Ruby, Python, PHP,.NET, Go, Lua, Crystal, Elixir, Java and Nim. Packages are available for most Unix-like systems, and libvips can also be installed on macOS and Windows. Windows downloads include a web-focused build with a limited reader set and a larger build with all supported readers; the project advises care before publicly deploying the latter. Optional dependencies and build choices can be selected from source. Use cases include large images, many CPUs, colour work, scientific analysis and general research and development. Its official GUI is nip4, and the library is licensed under LGPL-2.1-or-later. The listed plan is free.