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Convert images to JPG, PNG, WebP, AVIFlocally

100% local
Zero storage
Hébergé en France
Free

See how it works

How does the FileVert image converter work?

The FileVert image converter allows you to change the format of your images (JPEG, PNG, WebP, AVIF) directly in your browser. No files are sent to a server.

What "in your browser" means

  • No files are sent to a server
  • No remote storage
  • No external access to your data
  • Works even offline

What changes everything

Change your image format. In bulk, in your browser.

The challenge

Mixed formats

PNG, JPEG, WebP in the same folder: hard to integrate cleanly into a web project.

847 Mo142 fichiers
Folder tree

Your web folder, structured

Same folder tree on output: every file converted to your chosen format, subfolders included.

projet/
assets/
hero.jpg
gallery/
01.jpg
✓
Rationalize

One consistent format

No more mixed formats in one folder, fewer surprises at integration, less rework.

✓
AVIF

Convert per batch to AVIF

PNG, JPEG or WebP → AVIF for the whole folder in one go. Local, per batch: rare outside the cloud.

PNGJPEGWebP
AVIF×142 · par lot
Go further

Compress or crop next

Need to reduce weight or a uniform ratio? Chain to the compressor or crop tool, no re-import.

JPEG→
WebP→
AVIF→
Responsible flow

Convert here, send next

Your files stay on your device until you send. Transfer them in the right format, gallery or download. Chain to another tool if needed.

Ready on your device

Image gallery in Explore mode

Browse before downloading

Transfer these files →

Continue: compress or crop →

After the tool

Send the result: standard mode or Explore mode

When your file is ready on your device, send it with FileVert Transfer from the built-in send action. Choose whether the recipient downloads immediately (standard) or previews first in the browser without a silent local copy (Explore mode).

Standard mode

Secure link: the recipient downloads the file in the usual way. Best for final deliverables, archives and heavy attachments.

Guide: send very large files

Explore mode

Share images to flip through in a grid or fullscreen before any download decision.

Guide: photo gallery in the browser

Two modes depending on your usage

Convert image by image or transform entire folders from one format to another in one click.

Classic mode — Image by image

Ideal for precisely choosing the output format (JPEG, PNG, WebP, AVIF) of each image.

Folder mode — FileVert specific

Import a complete folder: you get exactly the same structure, fully converted, subfolders included.

Automatic conversion to JPEG, PNG, WebP or AVIF
Structure strictly preserved

Automatic batch conversion

Automatic conversion to JPEG, PNG, WebP or AVIF

Individual conversion

Precise choice of output format (JPEG, PNG, WebP, AVIF)

Transform entire folders

Convert an entire folder to a homogeneous format

Resize images during conversion

The FileVert image converter also allows you to resize your images during format conversion. You can change the format AND adjust the dimensions (width, height) of your images in a single operation, directly in your browser, without upload.

Combined conversion and resizing

Transform your images by changing both their format and dimensions. Ideal for preparing your images for the web: convert to WebP or AVIF while reducing size for faster loading.

Format change and resizing in a single operation

Conversion to modern web formats (WebP, AVIF) with optimized dimensions

Batch processing: convert and resize entire folders

Optimal preparation for web publishing or archiving

PRIVACY

Total privacy & digital sobriety

100% in your browser

No conversion server

No logs

No tracking

No advertising

No limits

No account required

No data stored

All calculations are performed locally on your device, without transfer.

Direct integration with FileVert

Once your images are transformed, transfer them immediately, without workflow interruption.

Start a transfer

Frequently Asked Questions

Everything you need to know about the FileVert image converter

Where are my images converted?

All conversions are performed directly in your browser, on your device. No files are transferred to a server.

Are images reconverted during transfer?

No. FileVert never modifies your files automatically. The converter is an optional tool you use before transfer.

Are there file or size limits?

No. No limits are imposed. You can convert as many files as needed.

Can I transform a complete folder with its subfolders?

Yes. You can import a complete folder with its entire structure, and the converter preserves exactly the same structure.

Can conversion be applied to an entire folder?

Yes. Batch conversion can be applied automatically to all images in a folder in a single operation.

Is there advertising or tracking?

No. There is neither advertising nor tracking.

Can I convert JPEG images to WebP or AVIF in batch?

Yes, the FileVert converter allows you to convert JPEG images to WebP or AVIF in batch. You can import multiple images or an entire folder and convert them all to your chosen format (WebP, AVIF, PNG, JPEG) in a single operation, directly in your browser, without upload.

How to convert a PNG folder to JPG without upload?

Import your PNG folder directly into the FileVert converter. All images will be converted to JPG while preserving the folder structure. No files are sent to a server: conversion is done entirely in your browser, without upload or cloud storage.

Can I change image format without visible loss?

Yes, the FileVert converter uses high-quality conversion algorithms that preserve visual quality when changing format. Conversions to WebP and AVIF in particular offer excellent results with reduced file size, ideal for the modern web.

Image format conversion tool (JPG, PNG, WebP, AVIF), 100% local in browser, no signup, to prepare your files before sending, web publishing or archiving.