VERT
vert.sh
Open-source converter that handles images, audio and documents on your device
No sign-upOn device
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convert.town
A pile of one-click converters that never upload the file.
Dozens of narrow, single-purpose conversion pages — resize an image, change its DPI, swap JPG for WebP, rotate a photo — each of which says on the page that the work happens in your browser and nothing is uploaded. No account, no queue, no watermark, no waiting. The trade-off is that every page does exactly one thing, so a multi-step job means several tabs and several downloads.
AltFTool does this too
If you would rather not leave the site, Image Resizer covers the same job here — free, no account, and it runs in your browser.
Open Image ResizerQuestions
Works the moment the page loads. No account, no email, no trial. Each page does one narrow job, so anything multi-step means chaining tools by hand.
No. Convert Town does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
Each page does one narrow job, so anything multi-step means chaining tools by hand.
Alternatives
Same category or same task, ordered by how closely they overlap.
vert.sh
Open-source converter that handles images, audio and documents on your device
convertio.co
Drag a file in, pick an output format, download the result
svgco.de
Traces a PNG or JPEG into a scalable SVG inside the browser
tinywow.com
A couple of hundred small file tools, free and with no account
pandoc.org
Converts between Markdown, LaTeX, DocBook, reStructuredText and dozens more
cloudconvert.com
Converts between around 200 file formats, including the awkward ones