Files and formats

Formats, books, email, Office files, encodings and safety

Opens

Feature	Leaftext	Obsidian	Typora	Calibre
Markdown files	✅	✅	✅	❌
HTML pages	✅	❌	❌	❌
XML files	✅	❌	❌	❌
TEI editions	✅	❌	❌	❌
JSON files	✅	❌	❌	❌
YAML files	✅	❌	❌	❌
INI config files	✅	❌	❌	❌
CSV and TSV tables	✅	❌	❌	❌
Plain text files	✅	❌	✅	❌
Saved email	✅	❌	❌	❌
Web archives	✅	❌	❌	❌
Word documents	✅	❌	❌	❌
Excel workbooks	✅	❌	❌	❌
PowerPoint decks	✅	❌	❌	❌
OpenDocument files	✅	❌	❌	❌
EPUB books	✅	❌	❌	✅
TypeScript files	✅	❌	❌	❌
JavaScript files	✅	❌	❌	❌
JSON with comments	✅	❌	❌	❌
CSS stylesheets	✅	❌	❌	❌
Shell scripts	✅	❌	❌	❌
TOML config files	✅	❌	❌	❌
Rust source files	✅	❌	❌	❌
Python source files	✅	❌	❌	❌
SQL scripts	✅	❌	❌	❌
Diff files	✅	❌	❌	❌
Dotenv files	✅	❌	❌	❌
GraphQL schemas	✅	❌	❌	❌
Docker build files	✅	❌	❌	❌
Extensionless text files	✅	❌	✅	❌
UTF-8, UTF-16, UTF-32	✅	❌	✅	✅
Keeps its encoding	✅	❌	✅	❌

EPUB books

Feature	Leaftext	Obsidian	Typora	Calibre
Book as one page	✅	❌	❌	❌
Chapters in reading order	✅	❌	❌	✅
Linked contents page	✅	❌	❌	✅
Chapter headings from contents	✅	❌	❌	❌
Title and author byline	✅	❌	❌	❌
Pictures from the book	✅	❌	❌	✅
SVG covers shown	✅	❌	❌	✅
Publisher styles, your theme	✅	❌	❌	✅
Small caps and superscripts	✅	❌	❌	✅
Hidden parts stay hidden	✅	❌	❌	✅
No network on open	✅	❌	❌	?
Web and email links	✅	❌	❌	✅
Book scripts never run	✅	❌	❌	✅
Damaged book explained	✅	❌	❌	✅
Encrypted book named	✅	❌	❌	✅
Obfuscated fonts read	✅	❌	❌	✅
Picture-heavy books drawn	✅	❌	❌	✅
Outline, minimap, find, pager	✅	❌	❌	❌

Kindle books

Feature	Leaftext	Obsidian	Typora	Calibre
Kindle book as page	✅	❌	❌	✅
Locked book says why	✅	❌	❌	✅
Kindle library titles	✅	❌	❌	?

Book details

Feature	Leaftext	Obsidian	Typora	Calibre
NCX and nav headings	✅	❌	❌	✅
Publisher classes mapped	✅	❌	❌	✅
Inline styles mapped	✅	❌	❌	✅
Byline skips drop cap	✅	❌	❌	❌
Empty chapters skipped	✅	❌	❌	❌
SVG covers kept	✅	❌	❌	✅
Comic pages drawn once	✅	❌	❌	✅
Books open on cover	✅	❌	❌	✅
First page at top	✅	❌	❌	✅
Every chapter outlined	✅	❌	❌	✅
Word counts in cards	✅	❌	❌	❌
Slide lists and tables	✅	❌	❌	❌
Removed bullets drawn plain	✅	❌	❌	❌
OpenDocument list openings	✅	❌	❌	❌
Cards only when cramped	✅	❌	❌	❌
Labels on bars	✅	❌	❌	❌

Plain text

Feature	Leaftext	Obsidian	Typora	Calibre
Kept exactly as typed	✅	❌	❌	❌
Copy button	✅	❌	❌	❌
Offered, never default	✅	❌	❌	❌

INI files

Feature	Leaftext	Obsidian	Typora	Calibre
Sections as headings	✅	❌	❌	❌
Keys as labels	✅	❌	❌	❌
Clickable link values	✅	❌	❌	❌
Comments shown in source	✅	❌	❌	❌
First equals sign splits	✅	❌	❌	❌
Title key heads page	✅	❌	❌	❌
Repeated keys in order	✅	❌	❌	❌
Keys keep their spelling	✅	❌	❌	❌
Edit keys in place	✅	❌	❌	❌
Saved as written	✅	❌	❌	❌

Source files

Feature	Leaftext	Obsidian	Typora	Calibre
File name heading	✅	❌	❌	❌
Theme syntax colors	✅	❌	❌	❌
Language badge shown	✅	❌	❌	❌
Copy button	✅	❌	❌	❌
Kept out of search	✅	❌	❌	❌

XML

Feature	Leaftext	Obsidian	Typora	Calibre
Any XML document	✅	❌	❌	❌
TEI found by content	✅	❌	❌	❌
Plists, XHTML, DocBook	✅	❌	❌	❌
Parse errors located	✅	❌	❌	❌
Fields as labels	✅	❌	❌	❌
Records as tables	✅	❌	❌	❌
Elements as sections	✅	❌	❌	❌
Tag names as words	✅	❌	❌	❌
URLs become links	✅	❌	❌	❌
Sitemaps as tables	✅	❌	❌	❌
RSS and Atom feeds	✅	❌	❌	❌
Maven POM files	✅	❌	❌	❌
File name as title	✅	❌	❌	❌
Comments fold open	✅	❌	❌	❌
Comments editable in place	✅	❌	❌	❌

TEI

Feature	Leaftext	Obsidian	Typora	Calibre
Main and long titles	✅	❌	❌	❌
Sanskrit titles italicized	✅	❌	❌	❌
Front matter folded	✅	❌	❌	❌
Divisions as headings	✅	❌	❌	❌
Verse stanzas quoted	✅	❌	❌	❌
Endnotes as footnotes	✅	❌	❌	❌
Cross-references linked	✅	❌	❌	❌

JSON and YAML

Feature	Leaftext	Obsidian	Typora	Calibre
Data as a page	✅	❌	❌	❌
Keys as labels	✅	❌	❌	❌
Record lists as tables	✅	❌	❌	❌
Nested keys as sections	✅	❌	❌	❌
Keys read as words	✅	❌	❌	❌
Title key heads page	✅	❌	❌	❌
Keys in file order	✅	❌	❌	❌
Numbers kept as written	✅	❌	❌	❌
JSON comments allowed	✅	❌	❌	❌
YAML anchors and aliases	✅	❌	❌	❌
YAML merge keys	✅	❌	❌	❌
Multi-document YAML table	✅	❌	❌	❌
Alias bombs refused	✅	❌	❌	❌
Parse errors name line	✅	❌	❌	❌
Deep nesting refused	✅	❌	❌	❌
Edit JSON values	✅	❌	❌	❌
Edit YAML values	✅	❌	❌	❌

HTML pages

Feature	Leaftext	Obsidian	Typora	Calibre
Page's own CSS	✅	❌	❌	❌
Own dark theme kept	✅	❌	❌	❌
Tab uses page title	✅	❌	❌	❌
No scripts or forms	✅	❌	❌	❌
Network addresses blocked	✅	❌	❌	❌
Own folder only	✅	❌	❌	❌
Find and outline inside	✅	❌	❌	❌
Select and follow links	✅	❌	❌	❌
Exports whole page	✅	❌	❌	❌
Mermaid inside HTML	✅	❌	❌	❌
Scroll kept across tabs	✅	❌	❌	❌
Source edits redraw live	✅	❌	❌	❌
Hidden panels stay hidden	✅	❌	❌	❌
Saved pages keep theme	✅	❌	❌	❌
Sprite icons drawn	✅	❌	❌	❌

Email

Feature	Leaftext	Obsidian	Typora	Calibre
Subject as heading	✅	❌	❌	❌
Addresses as mail links	✅	❌	❌	❌
HTML body sanitized	✅	❌	❌	❌
Plain body with links	✅	❌	❌	❌
Inline images shown	✅	❌	❌	❌
Attachments with sizes	✅	❌	❌	❌
Routing headers hidden	✅	❌	❌	❌
No network reached	✅	❌	❌	❌
Mail forms dropped	✅	❌	❌	❌
Any legacy charset	✅	❌	❌	❌
Edit mail in place	✅	❌	❌	❌
Exact editable ranges	✅	❌	❌	❌
Controls dropped whole	✅	❌	❌	❌
Images from cid parts	✅	❌	❌	❌
Readable attachment sizes	✅	❌	❌	❌
Line endings kept	✅	❌	❌	❌
Eight-bit legacy bodies	✅	❌	❌	❌

Office files

Feature	Leaftext	Obsidian	Typora	Calibre
Word headings and paragraphs	✅	❌	❌	❌
Eight bullet levels	✅	❌	❌	❌
Word tables drawn	✅	❌	❌	❌
Every sheet as table	✅	❌	❌	❌
Every slide drawn	✅	❌	❌	❌
Master slide bullets	✅	❌	❌	❌
Untitled slides titled	✅	❌	❌	❌
Presentation builds	✅	❌	❌	❌
Macros never run	✅	❌	❌	❌
Oversized parts refused	✅	❌	❌	❌
Only words written back	✅	❌	❌	❌
Styles and comments kept	✅	❌	❌	❌
Type on first sheet	✅	❌	❌	❌
Accent bar marks typing	✅	❌	❌	❌
Type in Word paragraphs	✅	❌	❌	❌
Type in spreadsheet cells	✅	❌	❌	❌
Edit slides where drawn	✅	❌	❌	❌
Part XML in source	✅	❌	❌	❌
Choose source slide/sheet	✅	❌	❌	❌
No sign-in needed	✅	❌	❌	❌
One zip reader	✅	❌	❌	❌
Every zip member kind	✅	❌	❌	❌
Unpacked only when read	✅	❌	❌	❌
Oversized members refused	✅	❌	❌	❌
Untouched parts copied exactly	✅	❌	❌	❌
Word numbering read	✅	❌	❌	❌
Removed bullets drawn plain	✅	❌	❌	❌
Repeated cells capped	✅	❌	❌	❌
Layout and master bullets	✅	❌	❌	❌
Picture bullets drawn	✅	❌	❌	❌
Titles from placeholders	✅	❌	❌	❌
Excel shared strings	✅	❌	❌	❌
Cells saved inline	✅	❌	❌	❌

Encodings

Feature	Leaftext	Obsidian	Typora	Calibre
Byte order marks	✅	❌	✅	❌
Both byte orders	✅	❌	✅	❌
Mark kept on save	✅	❌	✅	❌
Windows-1252 fallback	✅	❌	✅	❌
Binary files refused	✅	❌	✅	❌
Unknown extensions named	✅	❌	❌	❌
Invisible marks handled	✅	✅	✅	❌
Four-byte marks first	✅	❌	✅	❌
Zero byte means binary	✅	❌	✅	❌
Extensionless files tested	✅	❌	❌	❌
Unsavable characters named	✅	❌	❌	❌
Unreadable file explained	✅	❌	✅	❌

Safety

Feature	Leaftext	Obsidian	Typora	Calibre
YAML bomb refused early	✅	❌	❌	❌
Zip bombs refused	✅	❌	❌	?
Columns past XFD refused	✅	❌	❌	❌
Rows capped at 16,384	✅	❌	❌	❌
Encrypted books named	✅	❌	❌	✅
Book paths contained	✅	❌	❌	?
Books size-capped	✅	❌	❌	❌
Fallback chains bounded	✅	❌	❌	?
Saved-page SVG icons	✅	❌	❌	❌

How formats are read

Feature	Leaftext	Obsidian	Typora	Calibre
XHTML read as page	✅	❌	❌	❌
Own Markdown extensions	✅	❌	❌	❌
Bare addresses linked	✅	✅	✅	❌
Footnotes numbered by use	✅	✅	✅	❌
Picture sizes from headers	✅	❌	❌	❌
False sizes ignored	✅	❌	❌	❌
Alt text on hover	✅	❌	❌	❌
Drive paths in links	✅	✅	✅	❌
Frontmatter problems said once	✅	✅	❌	❌
Unknown cssclasses named	✅	❌	❌	❌
Colors stamped after sanitizing	✅	❌	❌	❌
Only note- classes	✅	❌	❌	❌
Pages keep theme attributes	✅	❌	❌	❌
Wiki link length capped	✅	❌	❌	❌
Terminal rendering	✅	❌	❌	❌