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Open-source licences

Last updated 2026-10-31

FreeMicroTools is built mostly from its own code. A few parts come from open-source projects, and their authors keep their copyright. Each is listed below with its licence and a link to its source code.

pdf-lib 1.17.1

Reading and writing PDF files in the PDF tools (including the HEIC to PDF Converter), the print tools that work on PDFs, the Passport Photo Maker and the GST Invoice Generator.

js-yaml 4.1.0

Reading and writing YAML in the JSON, YAML and XML Converter, in the browser.

marked 15.0.12

Turning Markdown into HTML in the Markdown to HTML Converter, in the browser.

Turndown 7.2.0

Turning HTML into Markdown in the Markdown to HTML Converter, in the browser.

sql-formatter 15.6.6

Laying out SQL in the SQL Formatter, in the browser.

qpdf (WebAssembly build by jsscheller) 11.0.0

Removing and setting PDF passwords and permissions in Unlock PDF and Protect PDF, running entirely in the browser.

imagetracerjs 1.2.6

Tracing pictures into vector shapes in the PNG to SVG Converter.

UTIF2 4.1.0

Opening TIFF files, including multi-page scans and faxes, in the Image Converter.

bcdec

The BC7 texture decoding and its partition tables in the Image Converter, rewritten in our own code.

libheif-js 1.23.2

Opening HEIC and HEIF photos in the HEIC to JPG and HEIC to PDF converters, in browsers that cannot open them themselves.

This library is used unmodified and is loaded as its own separate file, so it can be replaced with another build of the same library. Its complete source code is available from the links above, and the full licence texts are in the licence file.

wasm-media-encoders 0.7.0

Saving MP3 and OGG files in the Audio Converter and the Audio Trimmer.

This library is used unmodified and is loaded as its own separate file, so it can be replaced with another build of the same library. Its complete source code is available from the links above, and the full licence texts are in the licence file.

Signalsmith Stretch 1.3.2

Changing the pitch of songs without changing their speed in the Pitch Shifter.

Noto Serif and Noto Sans Mono 2.015 and 2.014

The typeface EPUB to PDF sets books in, reduced to the characters and tables needed and renamed.

PDF.js 6.3.289

Showing PDF pages in Sign PDF, Add Bleed and Crop Marks and PDF Fonts to Outlines; measuring pictures in the PDF Print Check; reading fonts and the shapes of their letters in PDF Fonts to Outlines; and the formula that turns CMYK print colours into screen colours when a file carries no colour profile, in Compress PDF and the PSD to PNG Converter.

Foxit standard fonts (serif, fixed-width, symbol and dingbats)

Standing in for Times, Courier, Symbol and Zapf Dingbats when a PDF uses them without embedding them, in PDF Fonts to Outlines. Served unchanged under neutral file names.

Liberation Sans

Standing in for Helvetica, Arial and other sans-serif fonts when a PDF uses them without embedding them, in PDF Fonts to Outlines, and the lettering of the PDFs made by the Invoice Generator and the Business Plan Template. Served unchanged under neutral file names.

Great Vibes, Dancing Script, Caveat and Mrs Saint Delafield

The four handwriting styles for typed signatures in Sign PDF, reduced to Latin characters and renamed Sign Hand 1 to 4.

zxcvbn-ts 4.2.0 with word lists 4.1.3 and 4.1.1

Working out how many guesses a password would take, and which words and patterns weaken it, in the Password Strength Checker.

Tesseract.js 7.0.0

Reading the text in pictures and scanned PDFs in Image to Text, running entirely in the browser.

Tabler Icons

The outline icons used across the site.

Outfit

The lettering of the FreeMicroTools logo, drawn as shapes. The font itself is not loaded by the site.

MIT License text

The MIT-licensed parts above are provided under these terms, with the copyright notices listed for each.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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