Convert files without handing them over
Online converters usually work the same way: you upload a file, a server converts it, and you download the result. That is fine for a holiday photo and uncomfortable for a contract, a payslip or a client export, because your file has been copied to someone else's machine and you have to trust what happens next.
This converter does the work in your browser with the same decoders your browser already uses to display images and documents, plus a few specialized libraries for formats it does not handle natively. Nothing is uploaded, so there is no queue, no file size limit set by a server and no account.
What it can convert
Images: JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, HEIC and SVG, in the combinations browsers can encode. Documents and text: Markdown, HTML, plain text and PDF output. Data: CSV, TSV, JSON, XML, YAML, TOML, INI and env files, plus Excel spreadsheets. Subtitles: SRT and VTT, in both directions.
Each popular pair has its own page with instructions and the details that actually matter for that conversion, such as what happens to transparency, metadata or number formats. The general converter handles everything else: drop a file and pick from the formats it can become.
- Images, including HEIC from iPhones and TIFF from scanners.
- Documents to and from Markdown, HTML, text and PDF.
- Data files, including CSV to Excel and JSON to CSV.
- Subtitles between SRT and VTT.
What conversion can and cannot do
Converting changes the container and the encoding, not the content. A blurry JPG stays blurry as a PNG, and a scanned PDF turned into text produces nothing unless the scan already has a text layer. Going from a lossy format to a lossless one makes the file bigger without improving it.
Some properties do not survive certain formats, and that is the format's design rather than a limitation of the tool. JPEG has no transparency, so transparent areas become white. CSV has no formulas or formatting, so a spreadsheet becomes values. Each pair page spells out exactly what carries over.
Built for everyday work, not just single files
For one file, the drop zone is the fastest route: add it, choose the target format, convert and download. For a folder of images, Image Studio has bulk conversion and compression that process up to 50 files in a run and hand back a ZIP.
Because conversions are local, everything scales with your own machine rather than with a shared server, so a batch that would sit in a queue elsewhere usually finishes here in seconds.
File converter questions
Is there a file size limit?
There is no server limit. Practical limits come from your device's memory, and very large files are more comfortable on a computer than a phone.
Are my files uploaded?
No. Every conversion runs in your browser, which is why it works for confidential documents.
Can I convert several files at once?
The converter handles one file at a time. For batches of images, use bulk convert or bulk compress in Image Studio.
Why is a conversion missing?
Only pairs that can be done reliably in a browser are offered. Anything that would need a server or produce a broken file is left out.
Does conversion reduce quality?
Converting between lossy formats adds a little compression each time. Lossless targets such as PNG keep the decoded image exactly.
Do I need to install anything?
No. Everything works in a modern browser, with no extension or download.