Volt
About
Who makes Volt
Volt is a macOS text editor for files too big to load into memory, made by MarketVision AG in Switzerland. Version 1.0 is out: download it, no sign-up.
Why does an editor for very large files exist?
Every editor is quick until the file is bigger than the machine. A 4 GB log, an export that came off a mainframe, a database dump somebody needs one line out of — at that size most editors either refuse the file or spend a minute loading it and another gigabyte holding it. Volt was written for exactly those files: a 4.23 GB log of 50.4 million lines opens in 2 milliseconds, on a few megabytes of memory, and stays that quick while you search it and edit it.
It is a full editor rather than a viewer, and it reads the awkward formats too:
- 129 programming languages across 500 file extensions.
- 220 character sets, including all 62 EBCDIC code pages.
- Nine kinds of line ending, from LF and CRLF to NEL, LS, PS and reversed CRLF.
- Mainframe records — IBM RDW and fixed-width — that have no line endings at all.
- Anything else, as a hex dump.
Who builds Volt?
MarketVision AG, a Swiss company. Volt is written in Swift — no Java runtime, no Electron, no bundled browser engine — and ships as a 26 MB download for Apple silicon and Intel Macs.
How is it paid for, and what will it cost?
Volt 1.0 is a free download. There is no advertising and no data business behind it. What the application itself sends — a daily count of use, which you can turn off — is set out on the privacy page, along with what the website measures with Google Analytics.
How do I get in touch?
Write to hello@volt-editor.com — about a file that will not open, a format that should be supported, a bug, or anything else. Every message is read by the people who write the code.
MarketVision AG · Switzerland · marketvision.ch
How do I get Volt?
Download it now, no sign-up; leave your address to hear what is new.