Many formats
Images, audio, video, documents and spreadsheets — dozens of formats in one place.
Free File Converter
Convert images, audio, video, documents & spreadsheets between 35 formats — free, no signup, nothing to install
Drop files here or click to select
Supported file formats
35 formats across five categories. Every format converts to every other format inside the same category — so any image becomes any other image, any video becomes any other video, and so on.
Images
Audio
Video
Documents
Spreadsheets
Why convert files with TechTools?
Pro-grade engine
Powered by ImageMagick, ffmpeg and pandoc for accurate, high-quality conversions.
Private uploads
Your uploaded file is removed right after conversion; results are reachable only by your private link and auto-deleted within 24 hours.
Free & instant
No signup and no software to install — upload, convert and download in seconds.
Popular file conversions
The conversions people reach for most often — all of them supported here, free and without an account.
Images
- PNG to JPG
- JPG to PNG
- WebP to JPG
- WebP to PNG
- PNG to WebP
- JPG to WebP
- TIFF to JPG
- BMP to JPG
- GIF to PNG
- TIFF to PNG
Documents
- PDF to DOCX
- DOCX to PDF
- PDF to TXT
- Markdown to PDF
- Markdown to DOCX
- HTML to PDF
- DOCX to TXT
- ODT to DOCX
- RTF to DOCX
- HTML to Markdown
Video
- MOV to MP4
- AVI to MP4
- MKV to MP4
- WebM to MP4
- WMV to MP4
- FLV to MP4
- MP4 to WebM
- 3GP to MP4
- M4V to MP4
- MPG to MP4
Audio
- WAV to MP3
- FLAC to MP3
- MP3 to WAV
- AAC to MP3
- OGG to MP3
- OPUS to MP3
- WMA to MP3
- FLAC to WAV
Spreadsheets
- CSV to XLSX
- XLSX to CSV
Conversions stay within a category. A video converts to any other video format, but not into an audio file — so extracting an MP3 out of an MP4 is not something this tool does yet.
How to convert a file online
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Upload your file
Drag and drop it onto the upload area above, or click to browse. Files up to 16 MB are accepted.
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Pick the target format
The dropdown fills automatically with every format your file can become — you never have to guess what is compatible.
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Convert
Hit Convert File. The work runs server-side on ImageMagick, ffmpeg or pandoc, which usually takes a few seconds.
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Download the result
Save the converted file from your private download link. It is deleted automatically within 24 hours.
Which format should you convert to?
The most common reason a conversion disappoints is picking the wrong target. Here is the short version of what each format is actually good at.
| If you want to… | Convert to | Why |
|---|---|---|
| Share a photo anywhere | JPG | Universally supported and small. The safe default for photographs. |
| Keep a transparent background | PNG | Lossless with real transparency — right for logos, icons and screenshots. JPG cannot hold transparency at all. |
| Make web images smaller | WebP | Typically 25–35 % smaller than JPG at the same quality, with transparency support. Every current browser reads it. |
| Play a video on any device | MP4 | The one video format phones, TVs, browsers and editors all accept. Convert MOV, MKV, AVI, WMV or FLV to MP4 when something refuses to play. |
| Embed video on a website | WebM | Smaller than MP4 for the same quality and built for the web, though older devices may not play it. |
| Shrink an audio file | MP3 | Plays on literally everything. Converting FLAC or WAV to MP3 typically cuts the size by 80–90 %. |
| Edit audio without quality loss | WAV or FLAC | Both are lossless. WAV is uncompressed and universally editable; FLAC stores the same audio in roughly half the space. |
| Send a document that must look identical | Layout and fonts are locked in, so it looks the same on every machine. Best for invoices, contracts and CVs. | |
| Let someone edit the text | DOCX | Opens in Word, Google Docs, LibreOffice and Pages. Convert PDF to DOCX when you need to change wording. |
| Open a spreadsheet in Excel | XLSX | Keeps formatting and multiple sheets. CSV is plain text — fine for importing data, useless for layout. |
Frequently asked questions
How do I convert a file online?
Drop your file onto the upload area (or click to browse), choose the target format, and click Convert File. When it's done, download the converted file.
Is the file converter free?
Yes, it's completely free with no signup and no software to install.
Which formats can I convert?
35 formats in five categories: images (JPG, JPEG, PNG, GIF, BMP, TIFF, WebP), audio (MP3, WAV, FLAC, AAC, OGG, WMA, OPUS, MP2), video (MP4, AVI, MOV, MKV, WebM, WMV, FLV, M4V, MPG, MPEG, 3GP), documents (PDF, DOCX, TXT, HTML, Markdown, RTF, ODT) and spreadsheets (CSV, XLSX). Every format converts to every other format in the same category.
Is there a file size limit?
You can convert files up to 16 MB each.
What happens to my uploaded files?
Your file is converted on our server using professional tools (ImageMagick, ffmpeg, pandoc). The uploaded copy is removed right after conversion, and the converted result is only reachable through your own private download link — never shared or indexed. Results are automatically deleted within 24 hours, so download yours before then.
Do I need to install any software?
No. Everything runs from your browser — you upload a file, the conversion happens on our server, and you download the result.
Do I need an account?
No. There is no signup and no login — open the page, convert, download. Nothing is tied to an account.
Can I extract MP3 audio from an MP4 video?
Not yet. Conversions run within a category — a video converts to any other video format, an audio file to any other audio format, but a video cannot currently be turned into an audio-only file. Video-to-audio extraction is on the list.
Can I convert PDF to Word (DOCX)?
Yes. Upload the PDF and pick DOCX as the target. The text is extracted and rebuilt as an editable document — bear in mind that complex page layouts, columns and images will not survive exactly, because a PDF stores a picture of a page rather than a document structure. It also works the other way round: DOCX to PDF.
How do I convert PNG to JPG?
Drop the PNG onto the upload area and choose JPG from the format list. Note that JPG has no transparency — any transparent area of the PNG becomes solid, so keep the PNG if you need the see-through background.
Can I convert HEIC photos from my iPhone?
Not currently — HEIC is not among the supported image formats. The simplest workaround is on the phone itself: Settings → Camera → Formats → Most Compatible makes the iPhone shoot JPG directly, and sharing a HEIC photo by email or to a PC usually converts it to JPG on the way out.
Will converting reduce the quality?
It depends on the target. Converting into a lossless format (PNG, TIFF, BMP, WAV, FLAC) keeps everything. Converting into a lossy one (JPG, WebP, MP3, AAC, MP4) discards some detail to save space — usually invisible once, but it stacks up if you convert the same file back and forth repeatedly. Always convert from the original whenever you can.
Why won't my video play, and will converting to MP4 fix it?
Usually yes. MKV, AVI, WMV, FLV and MOV files often carry codecs a given phone, TV or browser doesn't handle. Converting to MP4 re-encodes the video into the most widely supported container there is, which fixes the vast majority of "unsupported file" errors.
Does it work on a phone?
Yes. The converter works in any modern mobile browser on Android and iPhone — the heavy lifting happens on our server, so your device only uploads and downloads.
Why did my conversion fail?
The usual causes are a file over the 16 MB limit, a file whose real content doesn't match its extension (a renamed file), or a corrupted source. Try re-exporting the original and converting again.
Is there a limit on how many files I can convert?
No — convert as many as you like, one file at a time, with no daily cap, watermark or paywall.