About online-tool.ing
online-tool.ing is a collection of small, free tools for everyday work with numbers, code and text. The English version has 78 tools so far; the Dutch version has more.
What you'll find here
Every tool does one thing and has its own page: working out a percentage or VAT, rounding a number, formatting JSON or decoding a JWT. You don't need an account and there is no usage limit.
How it works
The tools run in your browser. Your numbers, files and text are processed on your own device and not sent to a server. Read more on the privacy page.
Open source
Some tools use open-source software, which this website serves itself:
- 7-Zip (WebAssembly) for packing and unpacking archives: GNU LGPL with the unRAR restriction (licence). RAR files can only be extracted; the unRAR code is never used to create RAR archives.
- libavif en libwebp via jSquash for AVIF and WebP: Apache 2.0 (licence)
- UTIF en pako for TIFF: MIT (licence, licence)
- gifenc for GIF: MIT (licence)
- pdf-lib for compressing, merging and editing PDFs: MIT (licence)
- pdf.js (Mozilla) for PDF page thumbnails: Apache 2.0 (licence)
- jsPDF for the invoice generator: MIT (licence)
- marked for Markdown to HTML: MIT (licence)
- Turndown for HTML to Markdown: MIT (licence)
- qrcode-generator (Kazuhiko Arase) for QR codes: MIT (licence). QR Code is a registered trademark of DENSO WAVE.
- JsBarcode for barcodes: MIT (licence)
- js-beautify for formatting HTML, CSS and JavaScript: MIT (licence)
- js-yaml for JSON to YAML and back: MIT (licence)
- math.js for derivatives, matrices and formulas in the maths tools: Apache 2.0 (licence, components)
- JSZip for ZIP downloads: MIT (licence)
- ImageTracer for vectorising: public domain (licence)
- The Geist typeface: SIL Open Font License (licence)