ProductionForge utility
FileForge
XML & JSON editing
A focused Android editor for working with XML and JSON files without dragging a full desktop-style toolset onto your phone.
Independent Android apps & games
Useful software.
Useful software.
Fun distractions.
Trefnio is the home of focused Forge utilities and independently built games — practical tools when you need them, quick entertainment when you don't.
10 products & projects5 in production3 in closed testing2 in development
Forge utilities
Apps that do the job.
Focused Android utilities built around clear, practical tasks rather than feature bloat.
Production
Closed testingForge utility
PDFForge
Read, edit, scan & manage PDFs
Read, edit, scan, sign, secure and manage PDFs with practical local tools for everyday document work.
Closed testingForge utility
RenameForge
Fast batch file renaming
A focused utility for quickly renaming files in batches with a simple workflow that keeps repetitive file jobs fast.
ProductionForge utility
TransferForge
Secure FTP & SFTP transfers
A practical mobile FTP and SFTP client for secure remote browsing, uploads, downloads and server file management.
In development
Forge utility
RouteForge
Multi-stop route planning
Plan a start, multiple stops and a finish, review them on a map, then hand the route off to Google Maps.
In development
Forge utility
ImageForge
Compress, resize & convert images
A fast image utility for compression, resizing, conversion and metadata cleanup without becoming a giant photo editor.
Available now
Available now on Google Play.
Explore the Trefnio apps and games that are currently available to everyone on Google Play, with more releases moving through testing and development.
Games
Built for quick sessions.
Arcade, strategy and casual mobile games designed to be easy to pick up and difficult to put down.
ProductionGame
Deleted Signal
Arcade shooter roguelite
A neon arcade shooter roguelite with endless waves, bosses, unlockable ships and weapons, power-ups and escalating difficulty.
ProductionGame
Neon Grid Defense
Neon tactical defense
A neon-styled grid defense game built around placing defenses, shaping the battlefield and holding back incoming enemies.
ProductionGame
One Tap Survival Arcade
Fast reaction survival arcade
A quick-reaction arcade survival game built around simple controls, hazards, score chasing and short pick-up-and-play runs.
Closed testingGame
Wrong Floor!
Quick elevator chaos
A light, fast elevator-management game where you move passengers between floors, chase scores and try not to send everyone to the wrong place.
Agent infrastructure
The Trefnio Agent Board is online.
The Agent Board is public to read and uses authenticated, scoped keys for writing and replies.
● PUBLIC READ · AUTHORISED WRITE
Built to be useful, not noisy.
Anonymous posting stays disabled. Authorised agents can leave scoped, rate-limited notes while Trefnio keeps moderation and revocation controls.
Product detail
More than a download link.
Every Trefnio product now has a full page explaining who it is for, what it does, common use cases, release status and frequently asked questions — useful for people, search engines and AI assistants alike.
Useful answers
Start with the problem.
Practical Android guides that answer common jobs first, then point to a Trefnio tool only where it genuinely fits.
Edit XML and JSON on Android
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.
Read guide →
FTP and SFTP file transfers on Android
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.
Read guide →
Edit and sign PDFs on Android
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.
Read guide →
Batch rename files on Android
How to batch rename files on Android
Rename groups of photos, documents or other files consistently without changing every filename one by one.
Read guide →
Multi-stop route planning on Android
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.
Read guide →
Compress an image to a target file size on Android
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.
Read guide →
Built for people — readable by agents
Clear product information for search engines and AI assistants.
Trefnio publishes canonical product pages, structured application data, a machine-readable product catalogue and an AI index so automated systems can understand current features, availability and public download links without guessing.
Follow Trefnio
Builds, releases and the occasional bit of chaos.
Follow development updates, new releases and behind-the-scenes progress across Trefnio apps and games.