Sites and apps similar to Koolyz include FFmpeg, which is free and open source. Other options are Penpot, Affinity, delphitools and Canva. There's no shortage of Image Optimizers like Koolyz, with more than 100 alternatives for Windows, Mac, Linux, Android and iPhone.
Convert, compress, and optimize images, PDF files with our powerful in browser tools. No data is sent, everything happens in your browser using web assembly. That means very less waiting to process your files!
A versatile online image compression tool that prioritizes your privacy. It handles everything locally in your browser—nothing is ever uploaded. Convert between JPG, PNG, GIF, and WebP, resize by dimension or ratio, and fine-tune quality with a live preview.
ToolsForImage is free and open-source platform for image compression, resizing, cropping, format conversion, rotation, watermarking, face blurring, and more.
Germany
EU
ConvertAPI is a fast and fault-tolerant web service used by software developers to convert Word documents, Excel spreadsheets, PowerPoint presentations, HTML documents, PDF files, and numerous other formats.
LithuaniaEU
Comprehensive Android network management with real-time monitoring for telephony, traffic, Wi-Fi, FTP server/client, advanced scanners, device grouping, VPN remote access, network graphing, stress testing, protocol support, and in-app tool documentation.
GermanyEU
PDF Shelter processes PDF documents on your own browser, avoiding data transfers and the risk of sharing data with third-parties.
QR Studio Pro is a QR code platform built for small businesses and agencies who need more than a basic static code generator. Create dynamic QR codes that can be updated anytime without reprinting — change a destination URL, swap a promotion, or retire a product, and the same...
Vertopal is an online platform for converting computer files to a variety of file formats. Our main goal is to provide the best conversion quality without needing to install third-party applications.
A professional photo size reducer for Mac which will reduce PNG, JPEG and GIF images size with LOSSLESS quality in a batch.
China
Aspose.Total Conversion is a free online document converter that completely supports conversion to/from many common word processing, spreadsheet, presentation, CAD drawings, images and other popular file formats.
United States
A set of free, no-account web tools for everyday PDF and document tasks: adding a digital signature to a PDF, running OCR on scans or photos to make them searchable, and generating QR codes.
NetherlandsEU
