Processed on your device
Your browser reads the file, performs the operation and creates the download. Best for audio joining, supported video joining, PDFs and images.
Browse device tools →PRIVATE-BY-DESIGN FILE UTILITIESEvery file tool.
Every file tool.
Free. Private. Fast.
Download authorized audio, join media, optimize documents and connect your own AI providers—inside one precise Trenith workspace.
✓No subscriptions✓Device-first file processing✓BYOK AI
Trenith
Tools
Tools
▣ON YOUR DEVICEAudio, video, PDF & images
◇NO FILE STORAGEInputs stay in your browser
⌁YOUR AI KEYSConnect provider accounts
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View all 31 tools →Quick launch
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Audio Downloader
Discover direct public audio files exposed by a webpage or media URL without bypassing access controls.
Public web source↗Audio Joiner
Join audio files or complete folders in a chosen order and export one lossless WAV on your device.
Processed on your device↗Video Joiner
Combine compatible video clips or folders in order and record one high-quality WebM on your device.
Processed on your device↗Merge PDF
Combine multiple PDF documents in the exact order you choose without uploading them.
Processed on your device↗Compress PDF
Optimize PDF object streams and document structure. Image-heavy documents may require a cloud compression provider.
Processed on your device↗Image Converter
Convert compatible images to JPG, PNG or WebP directly in the browser.
Processed on your device◇Private processingDevice tools keep files in your browser
○Zero subscriptionsThe Trenith interface is completely free
⌁Your provider accountsBring your own AI keys when needed
CLEAR BY DESIGN
Know exactly where every job runs.
Trenith labels each workflow by how it operates. There are no decorative tool cards and no surprise paywall after you click.
Public source scanner
The server checks a public URL for media links it openly exposes. It does not bypass authentication, DRM or private platform controls.
Open audio downloader →Your API key, your provider
Connect OpenAI, Anthropic, Gemini, ElevenLabs, OpenRouter or a compatible endpoint. Trenith does not bundle or resell provider credits.
Set up connections →02
One system, every workflow
Each category has dedicated tool pages, support notes, formats and a real action surface.
KEY
BRING YOUR OWN KEY
Open Connections Vault →AI access without another subscription.
Save connections for this session, test a supported provider, or unlock an encrypted device vault. Provider charges—if any—stay directly between you and that provider.
DIRECT ANSWERS
Frequently asked questions
Plain-language answers for people, search engines and answer engines.
What does processed on your device mean?＋
Audio, video, PDF and image source files are handled by browser APIs on your computer or phone. Trenith does not receive or store those input files for these tools.
Is Trenith Tools free?＋
Yes. The Trenith interface and device-processed utilities have no subscription price. If you connect an external AI provider, that provider may charge your own account according to its terms.
How does BYOK work?＋
BYOK means Bring Your Own Key. You add a provider key to a session-only vault, choose that connection in AI Studio, and the key is used only for your requested provider call. You can optionally encrypt connections on your device with a passphrase.
Are there unlimited uploads?＋
Trenith does not impose an artificial file-count limit on device tools. Your practical limit depends on browser memory, available storage, file size and codec support.
Can every visible tool be opened?＋
Yes. Device tools open a complete local workspace. Public-link tools open the URL scanner. Provider-dependent tools open the BYOK Studio with connection requirements and an API runner.