Markshift
Convert anything. Keep what matters.
Convert documents, spreadsheets and images on your Mac. Choose the format your next step needs and check the fidelity before you save. Nothing is uploaded.
- Free
- macOS 15 or later
- Apple silicon and Intel
Point at a red pin to read the crit
Markshift started as a way to turn documents into lean Markdown before they reach a model, and that is still the default. Each file says how faithful the conversion will be before you save it.
A better handoff in three steps.
Choose the next format
Start with Markdown for AI, or choose a document, spreadsheet or image format.
Check what carries over
Add your files and review the fidelity rating. Use Quick Look to inspect the result.
Save it on your Mac
Keep the converted file where you need it. Conversion happens on the device.
Thirteen formats under one menu.
Pick a format. Drop your files. Everything sits under Convert to, and Markdown for AI stays the default.
For AI
- Markdown compact or readable
- Plain text
Documents
- Word .docx
- RTF
- OpenDocument
- HTML
Spreadsheets
- Excel .xlsx
- CSV
Images
- PNG
- JPEG
- HEIC
- TIFF
Formatting survives. Nothing leaves.
Convert to anything
Markdown for AI, Word, PDF, RTF, OpenDocument, HTML, plain text, Excel, CSV, PNG, JPEG, HEIC or TIFF. Pick one under Convert to, then add files or folders.
Know what you will get
Every file gets a fidelity rating and a list of what carried over and what changed, with a Quick Look preview of the actual file before you save.
Formatting survives
Tables stay real tables in Word, PDF and Excel. Headings, bold, italic and numbered lists carry over. Numbers stay numbers, and IDs like 007 keep their zeros.
Still built for AI
Compact Markdown works as before. Token counts are exact for GPT-5, GPT-4o and the o-series, and a close guide for Claude, Gemini and Llama.
Nothing leaves your Mac
Every conversion happens on the device. Nothing is uploaded, and the app makes no network connections.
Tuned to your Mac
One universal app for Apple silicon and Intel. It reads your cores, memory and thermal state, and backs off when the Mac is hot or on Low Power Mode.
Four screens.
A small tool between two steps.
Markshift is free on the Mac App Store and runs on macOS 15 or later. It reads PDF, Word, PowerPoint, Excel, EPUB, HTML, RTF, OpenDocument, Markdown and images, and writes whichever format the next step needs. Speed settings run from Keep Mac Responsive to Maximum Speed, and never change the converted text.
- Platform
- macOS 15 or later
- Converts to
- 13 formats across AI, documents, spreadsheets and images
- Runs on
- Apple silicon and Intel
This page, as Markdown.
Press M on any page of this site. It turns into Markdown, with a rough token count. Markshift counts exactly, on your Mac.
Good to know.
Conversions preserve readable content, with a fidelity rating for each file. The exact layout of the source application may change, and spreadsheet output keeps values rather than formulas.
Conversions keep readable content, not the exact layout of the source application: Word or PowerPoint to PDF will not look identical to Office.
Slides to images is refused with a suggestion to export a PDF first.
Excel output keeps values, not formulas.
Token counts are exact only for the OpenAI tokenizer you choose; for other models they are a close guide.
Very large documents have stated limits, and anything left out of a conversion is reported in the result.
Ideated in April, shipped in September.
What changed once people used it. All releases ↗
Markshift is out on the Mac.
Documents into clean Markdown on your Mac, with the word and token count shown before anything reaches a model. Free.
Markshift now converts anything.
Word, PDF, spreadsheets and images join Markdown for AI, with a fidelity rating for every file. Still offline.
Give your next step the right file.
- Free
- Mac
- macOS 15 or later
- Works on device