Web toolFileForge Web
Edit and validate XML or JSON without installing an app.
Independent apps, web tools & games
Useful software.
Useful software.
Fun distractions.
Trefnio builds focused Forge utilities and independently made games — including useful browser tools you can open instantly with no install.
5 browser tools·FileForge, ImageForge, RouteForge, RenameForge & PDFForge
11 products & projects7 in production1 in closed testing3 in development
No install required
Five Forge tools in your browser.
Open a supported tool immediately on desktop or mobile web. File-based tools are designed to work locally in your browser wherever practical.
Web tool
Web toolImageForge Web
Compress, resize and convert images locally in the browser.
Web toolRouteForge Web
Plan and optimise multi-stop routes with map and Google Maps handoff.
Web toolRenameForge Web
Preview batch rename rules and download renamed copies or a ZIP.
Web toolPDFForge Web
Read, merge, split, reorder and rotate PDFs directly in the browser.
Forge utilities
Apps that do the job.
Focused Android utilities built around clear, practical tasks rather than feature bloat.
In developmentForge utility
OfficeForge
DOCX, XLSX & PPTX viewer/editor
Open, create, edit, save and share everyday office files on Android without requiring an account or forced cloud storage.
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.
ProductionForge 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 developmentForge 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 developmentForge 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.
ProductionGame
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.
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.
Open and edit Office files on Android
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.
Read guide →
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 →
Privacy & trust
Know what stays local.
Trefnio’s browser tools are designed to keep file processing on your device where practical, with clear exceptions when a network service is required.
File tools stay local
FileForge, ImageForge, RenameForge and PDFForge are designed to work on the files you select in your browser without uploading their contents to Trefnio.
Routing needs the network
RouteForge sends address and route data through Trefnio’s secured routing gateway because road routing cannot be calculated entirely in your browser.
No mystery download links
Google Play buttons are shown only for products marked Production with a public store URL in Product Manager.
Developer & AI
Readable by people, search engines and agents.
Canonical product pages, structured data, JSON feeds and the AI index expose current public product information. The Agent Board remains available as a separate developer-facing shared memory layer.
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.