Image Format Converter

Convert images between PNG, JPG, WebP, BMP, TIFF, and ICO formats. Adjust quality, resize, and batch convert up to 20 images at once.

1.0.0
Version
Auth
Batch

About Image Format Converter

Image-format gymnastics is the unglamorous middle of every workflow. A designer hands you PNGs, the build wants WebP, the iOS toolchain wants the favicon as an ICO, a print pipeline wants TIFF, and your blog CMS only accepts JPG. Doing this one image at a time in Preview, Photos or Paint takes minutes; doing it in batch via Photoshop or GIMP needs a script. Most online converters lock batch behind a paid tier or pop a watermark on the result.

This image format converter handles the six formats that show up in actual work — PNG, JPG/JPEG, WebP, BMP, TIFF, ICO — with sensible defaults for the things that usually trip people up. The quality slider (1–100) controls JPEG and WebP encoding; PNG and BMP are lossless and ignore it. Smart alpha handling composites transparency onto a white background when you convert a PNG with transparency to JPG or BMP (formats that don't carry an alpha channel), so the output isn't a black blob. ICO output generates the standard favicon size stack (16, 24, 32, 48, 64, 128, 256 px) automatically. Optional resize preserves aspect ratio by default so a 4000×3000 phone shot becomes a usable 1200×900 web asset in one pass. Batch mode handles up to 20 images at once and returns a zip of the converted files. No signup, no watermark.

Use it to bulk-convert PNG screenshots to WebP for site assets, produce a multi-resolution favicon from a single PNG logo, turn a client-supplied TIFF into a JPG for emailing, prep ICO files for a Windows app icon, downsize phone photos before uploading to a CMS, or just stop reaching for Photoshop for one-off conversions. Files up to 20 MB each, 20 per batch.

Image Format Converter Use Cases

  • Web developers bulk-converting PNG screenshots to WebP for site asset budgets
  • Designers producing a multi-size .ico favicon from a single PNG logo
  • Marketers downsizing phone photos to web-ready JPG before uploading to a CMS
  • Windows developers preparing .ico application icons for installers
  • Bloggers converting TIFF or BMP submissions from contributors to web-friendly JPG
  • Mac users converting WebP downloads to PNG for editing in non-WebP-aware apps
  • Batch-resizing a folder of product shots before listing on an e-commerce site

Image Format Converter Features

  • Six formats supported — PNG, JPG/JPEG, WebP, BMP, TIFF, ICO — with bidirectional conversion between any pair
  • Quality slider 1–100 for JPG and WebP; PNG, BMP and TIFF are lossless and ignore it
  • Smart alpha handling composites transparency onto white when the target format has no alpha channel
  • ICO output generates the standard favicon stack (16, 24, 32, 48, 64, 128, 256 px) in one file
  • Optional resize with aspect-ratio preservation by default — set width or height, the other is computed
  • Batch mode converts up to 20 images in one submission and returns the results as a zip download
  • Files up to 20 MB each, processed in a stateless serverless function and discarded immediately after the response

How to Use Image Format Converter

Upload one image or a batch

Drop a single image onto the upload zone for one-off conversion, or switch to Batch mode and select up to 20 files at once. Supported inputs: PNG, JPG, WebP, BMP, TIFF, ICO. Files up to 20 MB each.

Pick a target format

Choose the output format — PNG (lossless, transparency), JPG (smaller, no transparency), WebP (modern web delivery), BMP (legacy Windows), TIFF (print) or ICO (favicon and Windows app icon).

Set quality if needed

For JPG and WebP, the quality slider (1–100, default 85) controls the encoder. 85 is a typical web sweet spot, 92 for higher fidelity, 70 for tiny thumbnails. Lossless formats (PNG, BMP, TIFF) ignore the slider.

Optionally resize

Set width or height in pixels and the other is computed to preserve aspect ratio. Useful for bulk-shrinking phone shots to web sizes. Leave both blank to keep the original dimensions.

Convert and download

Single-image mode shows the converted result with input vs output size and a download button. Batch mode bundles all converted files into a zip. The conversion info panel lists what each output file weighs.

Image Format Converter FAQ

JPEG and BMP don't carry an alpha channel, so a transparent PNG converted to JPG would otherwise render with black where transparency used to be. This converter composites the image onto a white background first, so the JPG output looks like a print preview rather than a glitch. If you need a different background colour, use the Image Border tool with a coloured background, then convert.

Yes. PNG-to-ICO and similar conversions produce a standard favicon stack at 16, 24, 32, 48, 64, 128 and 256 px — the sizes Windows, browsers and Windows app installers actually use. You can drop the resulting .ico in your repo as favicon.ico without further processing.

It maps to the JPEG/WebP encoder's quality parameter (1=tiny, 100=near-lossless). 85 is the typical web default — good visual quality and reasonable file size. 92–95 for photography portfolios where artefacts matter. 70 for thumbnails where bandwidth matters. PNG, BMP and TIFF are lossless and ignore this setting.

20 images per batch and 20 MB per individual file. The batch returns a zip with one converted file per input plus a small summary panel showing how many succeeded vs failed. For larger jobs, run multiple batches or scripted Pillow locally.

No. Uploads are processed in a stateless serverless function and deleted immediately after the response is sent. Nothing is logged to durable storage, no thumbnails are cached. For a privacy-sensitive image, a fully in-browser tool like ToWebP.io or AnyWebP processes locally — that's the lowest-trust option.

No. The output is your image in the new format and (optionally) new size — nothing else. No watermark, no stamp, no metadata injection. Many free converters add a brand mark to push users to a paid tier; this one doesn't.

HEIC needs libheif (a heavy native dependency), AVIF encoders are still maturing in Pillow, and SVG is a vector format that needs a different conversion path (rendering rather than decoding). For HEIC, use iPhone's share-as-JPEG export. For SVG-to-raster, dedicated tools (svg2png, the inkscape CLI, or rsvg-convert) give better results than a generic image converter.

PNG, JPG, WebP, BMP, TIFF, ICO — max 20MB
85
Only applies to JPG and WebP. Higher = better quality, larger file.
Leave both empty to keep original size. Set one to auto-scale.

Select an image to preview

85

No files selected

Image Format Converter Tutorial

Why Convert Image Formats?

Different image formats serve different purposes. JPG is ideal for photographs with its small file size, PNG preserves transparency for logos and icons, WebP offers the best of both worlds with modern compression, and ICO is required for website favicons. Converting between formats lets you optimize images for web performance, print quality, or application compatibility.

How to Use

  1. Upload your image (PNG, JPG, WebP, BMP, TIFF, or ICO)
  2. Choose the target format from the dropdown
  3. Adjust quality for JPG/WebP (higher = better quality, larger file)
  4. Optionally set new dimensions to resize
  5. Click "Convert Image" and download the result

Format Comparison

  • PNG: Lossless, transparency, best for graphics
  • JPG: Lossy, no transparency, best for photos
  • WebP: Modern, both lossy/lossless, smaller files

Quality Tips

  • 85-95: High quality, slight compression
  • 60-80: Good balance of quality and size
  • 30-50: Aggressive compression, visible artifacts

Alpha Channel

  • PNG, WebP, TIFF, ICO support transparency
  • JPG and BMP do not — transparent areas become white
  • ICO auto-generates standard sizes (16-256px)