Spekter

Visual GUI tool for recursive directory and file comparison.

Side-by-side and unified diff views with synchronized scrolling,

inline character-level highlighting, Meld-style Bezier gutter

connectors and a tabbed interface. It follows your light or dark

system theme.

Binary files are detected and reported with sizes rather than

rendered as garbled text. Spekter detects when JSON or JSONL files

differ only in element ordering, and applies hunk-slider

postprocessing so an inserted object in a JSON array is marked as

one whole object.

Code and data files are syntax coloured, with grammars for a lot of

languages built in and more available as plugins: a plugin is just a

folder of Sublime Text grammar files, with no code to install.

Colouring is instant.

Large files stay responsive: a file's text appears instantly while

its diff is computed on a background thread, computed diffs are

cached, and the changed files are prefetched as you browse, so

opening or revisiting them feels immediate even at a million lines.

Ignored entries (.git, node_modules, editor swap files and the

like) are skipped but listed as dimmed stubs rather than silently