Parabola Explorer is described as 'comprehensive bitstream analyzer for HEVC. It gives an unrivalled insight into inner codec workings via an intuitive user interface backed with powerful, multi-faceted analysis of video bitstreams'. There are four alternatives to Parabola Explorer for Windows, Linux and Mac. The best alternative is StreamEye. It's not free, so if you're looking for a free alternative, you could try GitlHEVCAnalyzer. Other great apps like Parabola Explorer are Zond 265 (Paid) and CodecVisa (Paid).
Zond 265 allows you to decode, view and analyze HEVC and EVC bitstreams, clearly displaying all coding decisions and thoroughly checking syntax. It's an indispensable tool for developers of (H)EVC decoding, encoding and/or transcoding solutions.
CodecVisa is a powerful real-time analyzer for H.265/HEVC, H.264/AVC/MVC, GOOGLE VP9/VP8, MPEG2 Video and YUV video codecs. It can analyze H.265/HEVC, H.264/AVC/MVC, GOOGLE VP8/VP9, MPEG2 Video on different formats.