File Converters
These 22 file converters handle PDFs, images, audio and documents. Each one reads the file with the browser own FileReader and writes the result back out, so the file never leaves your machine.
22 tools
- Add Page Numbers to PDFAdd page numbers to PDF files in your browser, choosing the corner, the number format and the page the count starts from. Nothing is uploaded to a server.
- Add Watermark to PDFAdd watermark to PDF pages in your browser: text stamped across every page, with opacity, size and rotation under your control and no upload step at all.
- Base64 to Audio ConverterDecode base64 audio to a playable file in five formats, with a player and a download.
- Base64 to Image ConverterBase64 to image download: decode a base64 string or data URL back to an image you can view and download.
- Crop PDFTrim margins from PDF pages by setting a crop box, in points, on any page range.
- Extract Images from PDFExtract images from PDF files at the resolution they were stored, page by page. This recovers the embedded photographs rather than rendering whole pages.
- HTML to Image ConverterConvert HTML to image files in the browser, rendered through SVG foreignObject to a downloadable PNG, with the limits of that approach stated up front.
- Image ConverterThe image converter moves a file between PNG, JPEG and WebP, accepts SVG input, and shows the size of the result beside the original so the trade is visible.
- Image to PDF ConverterCombine PNG and JPEG images into a multi-page PDF in your browser, with page-size options.
- Image to WebP ConverterConvert an image to WebP from PNG, JPEG, GIF or BMP, entirely in your browser, with a quality slider and a before-and-after size comparison for every file.
- Markdown to PDF ConverterConvert Markdown to a formatted PDF with headings, lists and code blocks, in your browser.
- Merge PDFMerge PDF files into a single document in your browser, with the order under your control. Nothing is uploaded, so the files never leave your machine.
- PDF to Image ConverterConvert PDF to image files: render pages to downloadable PNGs at up to 4x resolution, in your browser.
- Rotate PDFRotate PDF pages by 90, 180 or 270 degrees, either the whole document or a chosen range. The change is lossless because only a rotation flag is rewritten.
- Screen RecorderRecord a screen, window or tab to a WebM file in the browser, with no upload and no install.
- Split PDFSplit a PDF by pulling a page range into a new document, or break the file into one PDF per page. Both run in your browser with nothing uploaded anywhere.
- SVG to JPG ConverterConvert SVG to JPG by rasterising the vector at any size, with a background fill you choose, since the JPEG format has no alpha channel to carry transparency.
- Text to Handwriting ConverterRender text as handwriting on ruled paper, with per-character wobble, as a downloadable PNG.
- Text to PDF ConverterTurn plain text into a paginated PDF with word wrap, adjustable margins and A4 or Letter pages.
- Text to SpeechText to speech using the voices already installed on your device, with speed and pitch control. The synthesis runs locally, so no text is sent to a server.
- TIFF to JPG ConverterConvert TIFF to JPG in your browser, including multi-page TIFF files, which most browsers cannot display at all. Each page is exported as a separate JPEG.
- Voice RecorderA voice recorder that captures audio from your microphone and saves it as a WebM file. The recording stays in the browser and is never uploaded anywhere.
What these file converters handle
Eight of the 22 work on PDFs: merging several into one, splitting a range into a new document, cropping the margins, rotating pages, stamping page numbers, adding a watermark, extracting the embedded images, and rendering pages out as pictures. PDF work runs through a library loaded into the page rather than a service, which is why a document you merge here is never transmitted.
Seven convert between image formats, covering PNG, JPEG, WebP, SVG and TIFF, plus turning images into a PDF and HTML into a picture. TIFF is the one most browsers cannot display at all, so that converter decodes the file itself and exports each page as a separate JPEG.
The rest cover documents and media: Markdown and plain text into PDF, text into speech using the voices your operating system already has, text rendered in a handwriting font, Base64 strings back into images or audio, and two recorders that capture the screen or the microphone.
Conversions that discard information say so before you run them. Turning a PNG into a JPEG throws away the alpha channel, and cropping a PDF hides content inside the file rather than deleting it, which matters if you were cropping to remove something sensitive.
Picking the right file converter
Several of these produce a similar-looking result from very different starting points, which is where most of the confusion sits.
| What you are starting with | The converter |
|---|---|
| A PDF you want fewer pages from | Split PDF, which pulls a range out. Crop PDF trims edges without removing pages |
| Photographs that live inside a PDF | Extract images from PDF. PDF to image renders whole pages instead |
| An image that is too large for the web | Image to WebP, or the image converter when you need a specific format |
| A TIFF your browser will not open | TIFF to JPG, which decodes it in the page and handles multi-page files |
| A Base64 string somebody sent you | Base64 to image for pictures, Base64 to audio for sound files |
| Text you want as a finished document | Text to PDF, or Markdown to PDF when the source carries formatting |
Frequently asked questions
Is there a file size limit on these converters?
The practical limit is your available memory, because the file is held in the page rather than streamed to a server. The multi-file tools refuse anything above 100 MB each, since a browser tab will not handle one reliably. A single large PDF often works well beyond that figure.
Does cropping a PDF actually remove the cropped content?
No. Cropping sets a crop box, which is the rectangle a viewer displays. Everything outside it is still in the file and can be recovered by anyone who changes that box back. To remove content, delete the pages or redact before you export rather than relying on a crop.
Why does my converted PDF come out larger than the original?
Usually because the original was already compressed more aggressively than the library can match, or because images were re-encoded on the way through. Merging is the exception: it copies page content across unchanged, so a merged file is close to the sum of its parts.
Can I convert files without an internet connection?
Yes, once the page has finished loading. The conversion libraries ship with the page and run locally, so no request goes out when you pick a file. You need a connection to load the page in the first place, but not to convert after that.
What happens to my file when I close the tab?
It is discarded. The file lives in the page memory for as long as the tab is open and is never written to a server or to permanent storage. Download the result before closing, because there is no history to return to and no copy held anywhere.