Find the job you need to get done.
Straightforward answers for common Android tasks — with relevant Trefnio tools linked where they genuinely fit.
How to open and edit DOCX, XLSX and PPTX files on Android
A practical guide to opening, editing, saving and sharing DOCX documents, XLSX spreadsheets and PPTX presentations on an Android device.
How to edit DOCX documents on Android
A practical guide to editing DOCX documents on Android while preserving rich text, headings, lists, alignment and links.
How to edit XLSX spreadsheets on Android
A practical guide to editing XLSX spreadsheets on Android, including cells, sheets, formatting, formulas and workbook search.
How to edit PPTX presentations on Android
A practical guide to viewing and editing PPTX presentations on Android, including text, images, shapes, slide order and slideshow playback.
How to edit XML and JSON files on Android
A practical guide to opening, checking and editing XML or JSON files on Android without relying on a desktop computer.
How to use FTP or SFTP on Android
Learn the difference between FTP and SFTP, what connection details you need, and how to manage remote files from an Android phone.
How to convert PDF to Word on Android
Convert selected PDF pages into an editable DOCX on Android, use OCR fallback for scanned pages, and understand which parts of the original layout may need tidying.
How to edit, sign and organise PDFs on Android
A practical workflow for reading, annotating, signing and organising PDF documents directly on an Android device.
How to batch rename files on Android
Rename groups of photos, documents or other files consistently without changing every filename one by one.
How to plan a multi-stop route on Android
Plan a start point, several stops and a final destination, then hand the journey to your navigation app.
How to compress an image to a target file size on Android
Understand the trade-offs between dimensions, format and quality when you need an image below a specific size such as 500 KB or 1 MB.
Quick arcade games for short Android sessions
What makes a mobile arcade game work well for a five-minute session, with several Trefnio examples built around fast restarts and simple goals.
What to look for in a mobile tower defense game
A quick guide to the decisions that make tower and grid defense games satisfying on a phone: placement, lanes, upgrades and readable battlefields.