CleverUtils vs Obsidian: Which Is Better in 2026?

CleverUtils is a free online file converter for people who simply need a file in another format and do not want to install software, create an account or pay for a subscription. It runs in the browser on any device, so the same tools work on a work laptop, a home PC or a phone.

The site covers more than 200 converters across 100+ formats. For audio there are MP3, WAV, FLAC and M4A conversions. Video tools handle MP4, MOV, MKV, AVI and GIF, including turning a video into audio or a short clip into a GIF. Image converters work with JPG, PNG, WebP, HEIC, AVIF, SVG and common camera RAW files, which is handy when an iPhone photo will not open on a Windows machine. Document and PDF tools cover DOCX, XLSX, PPTX and EPUB, and there are also converters for archives, fonts and 3D models.

Beyond plain format changes, CleverUtils includes a set of PDF tools: merge several PDFs into one, split a long document, compress a file so it fits an email attachment limit, and unlock a PDF you have the right to edit. There is also a growing group of AI tools. You can remove the background from a photo, replace it with a new one, upscale a small image, clean up a noisy photo, reduce noise in an audio recording and turn speech into text.

Privacy is kept simple. Files are sent over HTTPS, processed on the server and deleted automatically within two hours. There is no signup, no watermark is added to the results, and you do not need to leave an email address to download a file.

Under the hood the conversions rely on proven open-source engines: FFmpeg for audio and video, ImageMagick for images, LibreOffice for office documents and Ghostscript for PDFs. This keeps the output predictable and close to what desktop tools would produce.

For developers, CleverUtils offers a free public REST API that does not require an API key, so a conversion can be added to a script, a build pipeline or a small internal tool in a few lines of code. There is also an MCP server, which lets LLM agents call the converters directly when a workflow needs a file changed from one format to another.

Typical uses include students converting lecture slides to PDF, freelancers sending clients files in the format they asked for, office workers compressing scans before emailing them, and creators extracting audio from video or preparing images for the web in WebP or AVIF.

CleverUtils is a solo project built in Kyiv, Ukraine, and positioned as a free alternative to Convertio, Zamzar and CloudConvert. New converters and tools are added regularly, and the changelog on the site lists what has changed. If you need a quick, private and free way to convert a file, CleverUtils is built for exactly that.

Alternatives & competitors

Convertio, Zamzar, CloudConvert

Obsidian is a private, offline-first note-taking and knowledge-management app built on a simple but powerful idea: your notes are plain text files on your own device, and you own them. It's a favorite of writers, researchers and "second brain" builders who want to connect their ideas without handing their thinking to someone else's cloud.

What Obsidian is

Obsidian stores your notes as plain Markdown files in a local folder (a "vault"), then lets you link them together, visualize those links as an interactive graph, and extend the app with a huge library of community plugins. Because the files are local and open-format, everything stays fast, private and yours — readable in any text editor, now and decades from now.

Who it's for

Obsidian serves individual thinkers and writers, students and researchers, knowledge-base and "digital garden" builders, and teams needing collaborative notes. Anyone who wants to build a lasting, interconnected personal knowledge base — and cares about privacy and data ownership — finds it a natural home.

What it offers

• Local storage of notes as plain-text Markdown files
• Bidirectional linking between notes
• Graph visualization of how ideas connect
• Canvas — an infinite space for brainstorming and diagramming
• Daily notes, journaling and tag-based organization
• End-to-end encrypted Sync with version history
• Publish to turn notes into public wikis or knowledge bases
• Thousands of community plugins, themes and an open API

Your thoughts stay yours

Obsidian's core promise — "your thoughts are yours" — is what sets it apart. Notes live as plain files on your own machine, with no cloud lock-in, so you're never dependent on a company staying in business or a subscription staying active to read your own writing. For people building a knowledge base they intend to keep for life, that ownership and the open, future-proof file format are genuinely important, not just nice-to-haves.

Thinking in connections

Obsidian shines at linking ideas. Bidirectional links let you connect notes the way your mind actually associates thoughts, and the graph view visualizes that web so you can see clusters, gaps and unexpected relationships. Add the Canvas for spreading ideas out spatially, and Obsidian becomes a tool for genuine thinking — not just storing notes, but discovering how they relate, which is why it's beloved by researchers and writers.

Make it exactly yours

Few apps are as customizable as Obsidian. Its thousands of community plugins and themes, plus an open API, let you shape it into whatever you need — a task manager, a research tool, a writing environment, a spaced-repetition system. That extensibility means the app grows with your workflow rather than forcing you into someone else's, and there's an active community constantly building new capabilities on top of the core.

Sync privately, publish selectively

Obsidian's optional paid services extend the local-first core without compromising it. Sync keeps your vault end-to-end encrypted across all your devices with version history, so your notes travel with you but stay private even from Obsidian itself. Publish turns chosen notes into polished public wikis or knowledge bases — with custom domains, password protection and SEO-friendly, mobile-ready pages — so you can share exactly what you want to the world while everything else stays entirely yours. It's ownership and convenience, without the usual trade-off between them.

Why choose Obsidian

For anyone who wants a private, durable, deeply customizable place to think and build knowledge, Obsidian is a standout. Its local Markdown files, bidirectional linking and graph, powerful plugin ecosystem, and optional encrypted Sync and Publish — all on a free-to-use core — make it a practical, future-proof way to own your notes and connect your ideas, without ever surrendering control of your data.