Info

Notes

Font table editing is limited to a few tables only, so far. For more detailed information please see the change log.
Any fonts (or folders containing fonts) that are dropped onto the page remain local to the machine and are not uploaded to a server.

Responsibilities

You are responsible for complying with the terms of the license for each font you drop to FontDev.app and for using the service, so please be aware of such restrictions and limitations.
If you are not the vendor of the font data, you most likely do not have permissons for any modifications. Please repect this.

Contact

FontDev.App is a project by Olli Meier.

CHANGE LOG

2024/03/18 Version-0.2.2

• Show cmap information (no modification support, yet.)
• List and show glyphs in glyf and cff table
• Diff glyphs works YEAHHHH
• UI improvement: make font table first row sticky
• Bugfix: 'plain-text only' got in conflict with 'contentEditable'
• Bugfix: 'Save all'

2024/03/11 Version-0.2.1

• Added new feature 'Show Differences'
• Bugfix: 'Save all' (saved fonts without taking care of changes)
• make paste content plain text (not formatted)

2024/03/02 Version-0.2.0

• Bugfix: don't crash if field_value is undefined.

2024/02/25 Version-0.1.9

• When changing a font, fontdev.app now adds a name table entry (32767) with the information, that this font was changed by FontDev.app
• head.modified will be updated automatically when saving a font.

2024/02/25 Version-0.1.8

• Make OS/2 table fields editable:
• ul_unicode_ranges
• ul_code_page_ranges

2023/10/23 Version-0.1.7

• Make OS/2 table fields editable:
• fs_type

2023/10/14 Version-0.1.6

• Added buttons
• Save all
• Reload (no save)
• Refresh (no save)
• Added a few emojis for more fun with the app 🥸
• Added a a few 'hover' context information via HTML attribute 'title'

2023/10/13 Version-0.1.5

• Change CSS 'font-weight' to 'font-variation-settings' because of 'Safari'.
• Make it work with browser 'Safari'. (Thanks Anja Meiners for letting me know)
• Make subtables work:
• OS/2 fs_selection
• Added some functionality to use specifcic inputs. Currently only for checkboxes eg. in OS/2 fs_selection.

2023/10/09 Version-0.1.4

• Make maxp table fields editable:
• num_glyphs
• max_points
• max_contours
• max_composite_points
• max_composite_contours
• max_zones
• max_twilight_points
• max_storage
• max_function_defs
• max_instruction_defs
• max_stack_elements
• max_size_of_instructions
• max_component_elements
• max_component_depth
• Make post table fields editable:
• italic_angle
• underline_position
• underline_thickness
• min_mem_type42
• max_mem_type42
• min_mem_type1
• max_mem_type1
• Make OS/2 fields editable:
• ach_vend_id
• sx_height
• us_max_context
• us_lower_optical_point_size
• us_upper_optical_point_size
• converted int to hex and vise versa for backend modifications:
• us_last_char_index
• us_last_char_index
• us_default_char
• us_break_char
• Added some hover title background information, eg. why head glyph_data_format is not editable. Will be extended in future.
• head table editing is possible for almost all entries.
• Some UI improvements, eg. tabular figures for table view.

2023/10/08 Version-0.1.3

• Converted eg. 'Version16Dot16' to nice number.
• made dates readable (by using 'chrono'): from 'LongDateTime' to Year/Month/Day/Hour/Min/Sec
• Added 'or try with Noto' button to test the app if the user does not have a font at hand.
• Made saving fonts a bit smarter.
• Fix some typos
• Removed div intro_footer from table view

2023/10/07 Version-0.1.2

• a few design adjustments to the header navigation
• added a few drop down elements, inlcuding this Change Log.
• added a refesh function if no valid data was dropped.

2023/10/07 Version-0.1.1

• Make name table editable. (Thanks Andreas Frohloff)

2023/10/06 Version-0.1.0

• Webbased app as PWA.
• Make app installable and work offline + demo video: How to install
• a few small design imrovments
• added link to YouTube and info about 'fonts remain on machine' (Thanks Ken Lunde)

2023/10/04 Version-0.0.9

• First 'Proof of Concept' based on Rust (Fontations)
• OS/2 and hhea table are editable already.
• Added functionality to save fonts

2023/10/04 Version-0.0.0-0.0.8

I tried many different technologies over a few years, including:

• setting up a python based server
• create a python based Electron app
• try to push javascript fontkit.js
• try to push javascript opentype.js

Bottom line: all of that was too slow and tedious. The Electron app, for example, was a few hundred MegaBites in size and it was very difficult to get an app to work on different operating systems.