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Z Image Tools

WebP Converter — WebP to/from JPG & PNG, Smaller Files

Convert WebP ↔ JPG / PNG in your browser. Files never upload. Smaller files for the modern web.

Free No signup Client-side Privacy friendly Updated

Drop an image here, or

Max 25 MB. Files never leave your browser.

Source

× · ·

Output

Processing…

× · ·

How to use

  1. 1 Drop an image (any common format).
  2. 2 Pick output format — WebP, JPG, or PNG.
  3. 3 Adjust quality if applicable.
  4. 4 Download the result.

Why use this tool

  • Three output formats from one tool.
  • WebP typically 25–35% smaller than JPG at equivalent quality.
  • Supports transparency in WebP and PNG outputs.
  • Pure client-side — no upload, no privacy concerns.

Frequently asked questions

When should I use WebP?

Modern web images — WebP has near-universal browser support (Safari 14+, all other modern browsers). Use JPG only for legacy compatibility.

Does this support animated WebP?

Only the first frame is extracted. Animated WebP and APNG conversion requires a more complex pipeline (out of scope for this tool).

Will EXIF metadata survive?

No — re-encoding strips EXIF. Useful for privacy.

What is WebP Converter?

A WebP Converter is a tool that converts images between WebP and the JPG and PNG formats in both directions. It runs entirely in the browser using client-side processing, so files are never uploaded to a server. WebP produces smaller files for the modern web, while conversion back to JPG or PNG restores broad compatibility with older software and platforms.

Features

Three-way format conversion

Converts any browser-decodable image (WebP, JPG, PNG, and others createImageBitmap supports) into WebP, JPG, or PNG output — pick the target from a single dropdown.

Adjustable quality

A 10–100 slider (default 90) sets the encoder quality for WebP and JPEG output, passed straight to canvas.toBlob() as a 0.1–1.0 value; PNG is lossless so no quality control is shown.

Background fill for JPEG

JPEG has no alpha channel, so converting a transparent PNG or WebP to JPG fills transparent pixels with a chosen background color (default white) before encoding.

No upload, 25 MB cap

Processing runs entirely in the browser via the Canvas API; files above 25 MB are rejected client-side before any decode is attempted.

Example

Input

photo.png — 1920x1080, 2.4 MB, transparent background, output format set to JPG, quality 90, background #ffffff

Output

photo.jpg — 1920x1080, ~310 KB, transparent areas flattened to solid white, EXIF stripped

Common use cases

  1. 1

    Shrink images for faster page loads

    Convert JPG or PNG assets to WebP to cut file size for web delivery without a build pipeline or server-side image service.

  2. 2

    Restore compatibility with older tools

    Convert a WebP file back to JPG or PNG when a downstream app, CMS, or print workflow doesn't accept WebP.

  3. 3

    Strip EXIF metadata before sharing

    Re-encoding through canvas discards EXIF data (camera model, GPS, timestamps), which is a side effect useful for privacy when sharing photos.

Summary

WebP Converter decodes an image file with createImageBitmap(), draws it to a canvas, and re-encodes it to WebP, JPEG, or PNG via HTMLCanvasElement.toBlob() (or OffscreenCanvas.convertToBlob() where supported), with a quality slider for WebP/JPEG and an optional background fill for JPEG transparency. All decoding and encoding happens client-side in the browser — the file is never uploaded to a server, only a local object URL is created for preview and download.

Category
Creator
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. WebP Converter runs entirely client-side — no server upload, no logging, no tracking of your input.

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