# ImageConvert.tools

> A free image converter that runs entirely in the visitor's own browser. No sign up, no upload,
> no account and no file size limit. Converts between PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, ICO
> and PDF, and reads HEIC, SVG and JFIF as input.

Site: https://imageconvert.tools
Last updated: 2026-08-05

## What it does
- Converts images between formats entirely client-side, using the browser's own decoders plus
  dedicated WebAssembly and JavaScript decoders for HEIC and TIFF. No file is uploaded.
- Batch conversion with a single zip download, plus quality and resize controls.
- Video and audio conversion (MP4, WebM, MP3, GIF and more) via FFmpeg compiled to WebAssembly,
  served from this domain rather than from a third-party CDN.
- Publishes an open, machine-readable dataset of image format capabilities at
  https://imageconvert.tools/api/formats.json under CC BY 4.0.

## Facts
Every statement below was verified against the implementation, not estimated.

- Input formats that can be read (11): PNG, JPG, JFIF, WebP, AVIF, GIF, BMP, TIFF, ICO, SVG, HEIC.
- Output formats that can be written (9): PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, ICO, PDF.
- 91 input-to-output combinations are supported by the tool. 35 of
  them have hand-written, pair-specific content and are submitted for indexing; the rest work but
  are marked noindex rather than padded out with boilerplate.
- Decoders: the browser's own image decoder for PNG, JPG, JFIF, WebP, AVIF, GIF, BMP and ICO;
  libheif compiled to WebAssembly (via heic2any) for HEIC and HEIF; UTIF, a JavaScript decoder,
  for TIFF; the browser's SVG renderer for SVG.
- Encoders: canvas.toBlob for PNG, JPG and WebP; libavif compiled to WebAssembly for AVIF; a
  hand-written encoder for BMP (uncompressed 24 bit) and ICO (a PNG in an ICO header); gifenc for
  GIF; UTIF for TIFF; jsPDF for PDF.
- The FFmpeg core used for video is a single WebAssembly file of 32,129,114 bytes, about 30 MB,
  fetched on first use only and cached by the browser afterwards.
- Because every conversion passes through a pixel buffer, EXIF metadata including GPS coordinates
  is not carried into the output. The orientation flag is applied to the pixels and then dropped.
- Transparency is preserved into PNG, WebP, AVIF, GIF, TIFF and ICO, and flattened onto solid
  white for JPG, BMP and PDF, none of which can store an alpha channel.
- The default quality setting is 0.9, clamped between 0.1 and 1.

## Limitations
Stated plainly, because the honest answer to "can this do X" is more useful than a claim.

- HEIC, SVG and JFIF are input only. HEIC cannot be written because no browser exposes an HEVC
  image encoder to a web page and HEVC is patent encumbered. SVG cannot be written because
  converting pixels to vector shapes is tracing, not conversion. JFIF is not written because it
  is JPEG data under a different extension, so JPG is the equivalent output.
- Animation is not preserved. An animated GIF or WebP goes in and a single still frame comes out.
- Only the first page of a multi-page TIFF is read.
- ICC colour profiles are not carried across; the canvas works in sRGB, so a wide gamut original
  is converted to sRGB.
- ICO output holds one image, and anything larger than 256 x 256 is scaled down, which is the
  format's own ceiling.
- Very large files are limited by the memory available to the browser tab, not by a policy. There
  is no fixed threshold to quote, because it depends on the device, the browser and what else is
  open. A file that fails on a phone often converts on a laptop.
- No conversion improves an image. Converting a lossy source to a lossless format stops further
  loss but restores nothing, and converting one lossy format to another compresses the picture a
  second time.
- No file size or compression-ratio figures are published, because none have been measured on a
  documented test set. The WebP percentages quoted in the guides are Google's own published
  figures and are attributed as such.

## Guides
- WebP vs PNG: which should you use?: https://imageconvert.tools/guides/webp-vs-png
  Both are lossless-capable and both support transparency. The difference is compression efficiency and where each format is still expected.
- JPG vs PNG: when to use each: https://imageconvert.tools/guides/jpg-vs-png
  The rule of thumb is simple once you know why it works: JPG for photos, PNG for anything that needs sharp edges, flat color, or transparency.
- How image compression works: https://imageconvert.tools/guides/how-image-compression-works
  Every format on this site falls into one of two camps: lossless, which keeps every pixel exact, and lossy, which throws away detail you are unlikely to notice.
- HEIC vs JPG: why iPhone photos need converting: https://imageconvert.tools/guides/heic-vs-jpg
  Your iPhone did not switch formats to be difficult. HEIC is genuinely more efficient than JPG, it is just not accepted everywhere yet.
- AVIF vs WebP: the next-gen image format comparison: https://imageconvert.tools/guides/avif-vs-webp
  Both beat JPG and PNG on file size. AVIF usually compresses smaller still, WebP is the more broadly supported, safer default.

## Conversion pages
Every supported pair has a page at https://imageconvert.tools/convert/{from}-to-{to}. Examples:
- PNG to JPG: https://imageconvert.tools/convert/png-to-jpg
- PNG to WebP: https://imageconvert.tools/convert/png-to-webp
- PNG to AVIF: https://imageconvert.tools/convert/png-to-avif
- PNG to BMP: https://imageconvert.tools/convert/png-to-bmp
- PNG to ICO: https://imageconvert.tools/convert/png-to-ico
- JPG to PNG: https://imageconvert.tools/convert/jpg-to-png
- JPG to WebP: https://imageconvert.tools/convert/jpg-to-webp
- JPG to AVIF: https://imageconvert.tools/convert/jpg-to-avif
- JFIF to JPG: https://imageconvert.tools/convert/jfif-to-jpg
- WebP to PNG: https://imageconvert.tools/convert/webp-to-png
- WebP to JPG: https://imageconvert.tools/convert/webp-to-jpg
- WebP to AVIF: https://imageconvert.tools/convert/webp-to-avif
The full grouped list is at https://imageconvert.tools/convert.

## Tool pages
- QR Code Generator: https://imageconvert.tools/tools/qr-code-generator
- Password Generator: https://imageconvert.tools/tools/password-generator
- Fancy Text Generator: https://imageconvert.tools/tools/fancy-text-generator
- Spin the Wheel: https://imageconvert.tools/tools/spin-the-wheel
- Image Compressor: https://imageconvert.tools/tools/image-compressor
- Image Resizer: https://imageconvert.tools/tools/image-resizer
- Images to PDF: https://imageconvert.tools/tools/images-to-pdf
- Crop Image: https://imageconvert.tools/tools/crop-image
- Rotate & Flip Image: https://imageconvert.tools/tools/rotate-and-flip
- Video Converter: https://imageconvert.tools/tools/video-converter
- MP4 to MP3: https://imageconvert.tools/tools/mp4-to-mp3
- Video to GIF: https://imageconvert.tools/tools/video-to-gif

## Key pages
- Home and converter: https://imageconvert.tools
- How the conversion actually works, including metadata handling: https://imageconvert.tools/how-it-works
- How to verify nothing is uploaded: https://imageconvert.tools/privacy/how-we-prove-it
- Open image format dataset (CC BY 4.0): https://imageconvert.tools/api
- Embed the converter on another site: https://imageconvert.tools/embed
- All conversions, grouped by input format: https://imageconvert.tools/convert
- About: https://imageconvert.tools/about
- Privacy: https://imageconvert.tools/privacy
- Terms: https://imageconvert.tools/terms

## Privacy
All conversion happens client-side, in the visitor's own browser. No file is ever uploaded. A
Content-Security-Policy with a same-origin connect-src is served on every page, so the browser
itself blocks any attempt to send image data elsewhere. There is no analytics that requires
consent, and therefore no cookie banner.

## Citation
Preferred form:
ImageConvert.tools (2026). "WebP vs PNG". https://imageconvert.tools/guides/webp-vs-png

For the dataset:
ImageConvert.tools (2026). "Image format capability dataset", CC BY 4.0.
https://imageconvert.tools/api

## Crawling
All AI crawlers are explicitly allowed in https://imageconvert.tools/robots.txt. This is a deliberate choice:
the tool is free, runs on the visitor's own device and carries no advertising, so a citation
costs nothing and is the site's cheapest form of distribution.