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
erased, and the rules go both ways: expand an ignored directory or
open an ignored file to compare it anyway, or right-click any entry
to ignore it yourself. These choices are remembered per directory
pair.



An instant, keyboard-driven alternative to Meld and diff for
comparing folders and code.