100% Browser-Based · No Upload · No Sign-up

Universal file converter

Drop any file and pick an output format. Converts images, audio, PDFs, Word docs, Excel sheets, JSON, CSV, YAML, Markdown and more — all inside your browser. (Looking for video conversion? Try Video Compressor, Video → MP3 or Video → GIF instead.) Your files never leave your device.

Drop a file here or browse

Images · Audio · PDF · DOCX · XLSX · CSV · JSON · YAML · Markdown · HTML · and more

ImagesPNGJPGWebPGIFAVIFBMPSVG→PNGICO
AudioMP3WAVOGGFLAC→MP3M4A→MP3AAC→MP3
VideoNot converted here — try Video Compressor, Video → MP3 or Video → GIF
Docs & DataPDF→JPGDOCX→HTMLXLSX→CSVCSV↔JSONYAML↔JSONMarkdown→HTML

What you can convert

🖼

Images

Convert between PNG, JPG, WebP, GIF, BMP, AVIF, SVG and ICO using the Canvas API — instant, lossless-to-lossy or vice versa, with quality and scale controls.

🎵

Audio

Convert between MP3, WAV and OGG, or convert FLAC, M4A, AAC, WMA and Opus into MP3 or WAV — all instant, via Web Audio + lamejs. (Encoding to FLAC or M4A needs ffmpeg.wasm, which this site can't load — same reason video conversion isn't offered here.)

🎬

Video

Not available in this tool — video transcoding needs ffmpeg.wasm, which needs cross-origin isolation this site doesn't enable. Use Video Compressor, Video → MP3 or Video → GIF instead.

📄

Documents & data

PDF to JPG, DOCX to HTML, Excel to CSV, CSV↔JSON, YAML↔JSON, Markdown to HTML — each uses the smallest library that can do the job.

File converter FAQ

Are my files uploaded anywhere?

No. Every conversion runs entirely inside your browser using JavaScript and WebAssembly. Your files are never sent to a server and the tool works offline after the page has loaded.

Does this convert video files?

No — video transcoding needs ffmpeg.wasm, a WebAssembly build of FFmpeg, which in turn needs a cross-origin-isolated page. This site doesn't set those headers (they'd break ad support), so video conversion is disabled here. Use the dedicated Video Compressor, Video → MP3 or Video → GIF tools instead — they're built around that limitation.

Can I convert DOCX or PPTX to PDF?

DOCX is converted to an HTML document using the Mammoth library. You can then use your browser's File → Print → Save as PDF to get a PDF. A direct DOCX-to-PDF pipeline is not possible in a purely client-side tool because it requires a full document-rendering engine.

What is the maximum file size?

There is no enforced limit for the formats this tool handles — you are only bounded by your device's available RAM. Very large audio, image or document files may struggle on low-memory devices.

Which output audio format gives the smallest file?

Of the formats this tool can output — MP3, OGG or WAV — MP3 typically produces the smallest files for music and speech. OGG Vorbis at the same bitrate often sounds slightly better than MP3. WAV is uncompressed and by far the largest — only pick it if you need lossless, editable audio.