File

Image Converter

Convert JPEG, PNG, and WebP into WebP, JPEG, PNG, AVIF, or losslessly optimized PNG entirely in the browser. Built for web image delivery, multi-platform asset prep, and release-ready resources without uploading source files anywhere.

  • Drag, multi-select, or import a whole folder and let the tool pick image files
  • Per-file status, single-image progress, and an overall progress bar
  • Switch output between WebP, JPEG, PNG, AVIF, and lossless PNG optimization
  • Keep original files intact with a configurable filename suffix
  • Download files one by one or pack everything into a single ZIP
tools/Image Converter
0 images

Drop images here, or click to pick files

JPEG, PNG, and WebP are supported. Multi-select and folder picking both work.

Folder picking depends on browser support. Fall back to multi-select if needed.

Good default for the web. Typically smaller than JPEG with broad browser support.

80%

Example: with suffix -converted, photo.jpg becomes photo-converted.webp and the original stays untouched.

Overall 0%
Per-file progress and output will appear here once images are imported.
Command

Overview

Covers the four stages that matter for image format conversion: import, convert, compare, and export.

  1. 01

    Batch conversion queue

    Import multiple files or an entire folder and process each one with explicit status tracking.

  2. 02

    Multiple output formats

    A single source can be exported to WebP, JPEG, PNG, AVIF, or losslessly optimized PNG depending on the delivery target.

  3. 03

    Size change at a glance

    See original size, output size, and the percentage change to evaluate the trade-off quickly.

  4. 04

    Predictable naming

    A configurable filename suffix keeps the original next to the converted version, so comparing and rolling back stays simple.

  5. 05

    Single or bulk export

    Download a single image or pack the whole batch into a ZIP for handoff and archival.

  6. 06

    Runs locally

    Decoding and encoding happen inside the browser. Source images are never uploaded to a third-party service.

How to use

Recommended order: import, configure, convert, verify, export.

  1. 01

    Import images by drag-and-drop, multi-select, or folder picker.

  2. 02

    Pick an output format, adjust quality if needed, and set the filename suffix.

  3. 03

    Start the conversion and watch per-file status and the overall progress.

  4. 04

    Check output size, change percentage, and any failed items, then re-run with different settings if needed.

  5. 05

    Download the files you want, or pack everything into a ZIP in one click.

Details

Built around the common needs of image format conversion and web asset delivery.

  • Batch queue with per-file status and progress tracking
  • JPEG, PNG, and WebP input with WebP, JPEG, PNG, AVIF, or PNG optimized output
  • AVIF encoding for size-sensitive modern delivery
  • Lossless PNG optimization that keeps visual fidelity intact
  • Quality slider for the quality and size trade-off on photo assets
  • Configurable filename suffix to avoid overwriting source files
  • One-click ZIP export for clean handoff
  • Everything runs locally in the browser, including private and offline workflows

Use cases

Useful in web publishing, content operations, product media prep, and design-to-development handoff.

  1. Web image format targeting

    Normalize images from different sources into a format that loads faster on the web.

  2. Cross-platform handoff

    Generate compatible output for browsers, email clients, and document systems to avoid rendering issues.

  3. Pre-release asset preparation

    Standardize formats before assets enter the project, which simplifies later delivery and size review.

  4. Bulk content operations

    Batch-process editorial and campaign images to shorten the prep time before publishing.

  5. E-commerce product media

    Produce platform-specific format variants while balancing clarity and file size.

  6. Design and development collaboration

    Keep original and converted versions side by side through suffix-based naming for review and rollback.

See also

If the converted file still needs to be lighter for delivery, pass it through Image Compressor next to tune quality against size. Before making WebP or AVIF the default delivery format, verify support with Browser Compatibility Detector so the format choice matches the browsers and devices your users actually run.

Best practices

Pick format and quality based on real delivery targets, visual needs, and runtime constraints.

  • Define the target browser and device matrix before choosing a default output format.
  • Prefer WebP or JPEG for photo content. Prefer PNG or PNG optimized for transparency and UI graphics.
  • Do a manual visual check on critical hero and product assets to catch quality regressions.
  • For high-traffic pages, pair the most efficient format with a JPEG or PNG fallback.
  • Keep naming conventions stable so batch results stay traceable and reversible.
  • Add format conversion to your release checks and watch core Web Vitals over time.

Limitations

Each format trades compatibility, encoding time, fidelity, and size differently. No single format fits every case.

  • AVIF and similar high-efficiency formats encode more slowly. Process large batches in smaller chunks.
  • The same quality value behaves differently across image content. Photos and icons usually need separate strategies.
  • Folder import depends on browser implementation, so verify it in the environment your team actually uses.
  • Transparency, gradients, and fine details may render differently after conversion. Review critical assets manually.
  • Always retest converted images in the real page environment for loading speed and visual quality.
  • Final decisions should be based on performance and business metrics together, including LCP, bandwidth, and conversion.

FAQ

Common questions about format choice, local processing, naming, and where this tool fits.

Which input and output formats are supported?

Input: JPEG, PNG, and WebP. Output: WebP, JPEG, PNG, AVIF, and losslessly optimized PNG.

What is the difference between PNG and PNG optimized?

PNG optimized keeps PNG output but applies lossless compression, so the file gets smaller without any visible quality change.

Why is a converted file sometimes larger than the original?

When the source is already highly compressed or the target format suits a different kind of content, encoding overhead can grow the file. Try another format for those assets.

How should I pick a default output format?

Start from the browsers and devices you support. WebP is a safe default for the web. Use PNG when you need transparency, and AVIF when minimum size is the priority.

Can I export everything at once?

Yes. After conversion, the Download ZIP option packs all output files into a single archive.

Are my images uploaded anywhere?

No. Decoding and encoding happen locally in your browser. Images are never sent to a third-party service.

How do I avoid overwriting the originals?

A filename suffix is appended to every output file, so the original remains untouched and you can keep multiple versions side by side.

Does this help with SEO?

Indirectly. Choosing the right format and reducing image weight improves loading speed and core Web Vitals, which feeds into search experience.

Related tools

Pair this with image compression, Base64 conversion, and EXIF cleanup to create a full image processing flow.