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Compress and resize imageslocally

100% local
Zero storage
Hébergé en France
Free

See how it works

How does the FileVert image compressor work?

The FileVert image compressor allows you to compress JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF and SVG images directly in your browser. Unlike online image compressor tools, no files are sent to a server: everything is processed locally, individually or in bulk. Reduce image weight becomes simple with this free photo compression, no signup required.

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

Prepare your images before sending. In bulk, in your browser.

The challenge

Not web-ready

Images that are too heavy or in the wrong format: pages load slowly and the batch wastes bandwidth unnecessarily.

847 Mo142 fichiers
Folder tree

Your web folder, structured

Drop the full folder tree → get it back identical, ready for the web.

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

Auto-sized groups

Similar-sized images are grouped automatically, one dimension setting per group, not file by file.

1

1920 px

×24

auto
2

1280 px

×18

auto
3

800 px

×9

auto
AVIF

An entire batch in AVIF

Compress a whole folder to AVIF, lighter, same on-screen look. Local, per batch: rare outside the cloud.

JPEGPNG
AVIF×142 · par lot
Right format

Same crop across the batch

Need a uniform ratio or contact sheet? Switch to the crop tool, no re-import.

1:1
16:9
9:16
Responsible flow

Optimize here, send next

Your files stay on your device until you send. Transfer them already lighter, 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: 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 to compress images

Compress image by image or compress images in bulk according to your needs.

Classic mode — Compress image by image

Ideal for compressing JPEG or compressing PNG individually with precise quality control. Reduce image weight becomes simple and fast.

Folder mode — Compress images in bulk

Compress complete image folders in a single operation. You get exactly the same structure, with all subfolders, all compressed images.

Free photo compression in bulk
Structure strictly preserved

Individual compression

Compress one image at a time with full control over each file

Mass compression

Process multiple images simultaneously to save time

Automatic batch resize

Smart resizing automatically applied to an entire folder

Resize images directly in your browser

The FileVert image compressor also allows you to resize your images (JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, SVG, RAW) before or during compression. You can reduce dimensions (width, height, resolution) image by image or in bulk, without sending to a server, directly in your browser.

Automatic intelligent resizing

The system automatically analyzes your images and suggests the optimal size for each folder or group of images. No need to resize each photo manually: FileVert detects the average width of your images and suggests a consistent size adapted for the web.

Automatic analysis of average image width

Intelligent suggestion of optimal size per folder

Automatic grouping of similar images

Customization possible for each folder or group

Supported formats

Compress photos and logos. SVG and RAW accepted as input, output as bitmap.

Input formats

JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF, SVG, RAW (CR2, CR3, NEF, NRW, ARW, DNG, RAF, ORF, RW2, PEF, SRW, 3FR)

Output formats

JPEG, PNG, WebP, AVIF

SVG input

SVG is rasterized locally (PNG by default if you keep the original format). No SVG output: use the vectorizer for editable vector files.

RAW input

The RAW file is not demosaiced: we extract the embedded JPEG preview, then compress to JPEG, PNG, WebP or AVIF. Output resolution matches that preview, not full sensor resolution.

Aspect ratio crop and reference images

Prepare a homogeneous batch (16:9, 9:16, 1:1) and references for image to video. Dedicated tool with thumbnail board generator.

Crop and references

Local image compressor vs classic online image compressor

No upload

No cloud storage

Total privacy

Batch processing (bulk image compressor)

PRIVACY

Total privacy & digital sobriety

100% in your browser

No processing 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.

View in the FileVert System

Our other tools from FileVert Studio

Prepare your files with our other free, local tools.

Image Upscaler

Upscale x2 or x4 without loss of sharpness for your visuals.

Use

Image converter

Convert to JPG, PNG, WebP or AVIF, in batch, locally in your browser.

Use

Crop and references

Same ratio across the batch, reference images and thumbnail board for image to video.

Use

Vectorize an image, a logo

Vectorize JPEG, PNG, WebP, AVIF, GIF, BMP and SVG to SVG locally, with editable layers and pro exports.

Use

Compress PDF

Compress and optimize your PDF documents instantly.

Use

Redact and anonymize PDF and photos

Face blur, PII redaction, EXIF and PDF metadata strip. 100% local — work on a copy, keep the original.

Use

Audio converter

Convert and compress audio files locally (MP3, M4A, WAV, AIFF, FLAC, OGG), in batch, with no server.

Use
What’s next?

Everything you can do with FileVert

Prepare locally, send up to 200 GB, let recipients preview without downloading, collaborate and measure your impact. Discover every use case.

See all use cases

Direct integration with FileVert

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

Start a transfer

Frequently Asked Questions

Everything you need to know about the FileVert image compressor

Where are my images processed during compression?

All images are processed directly in your browser, on your machine. No files are sent to a server. Unlike classic online image or photo compressors, everything is processed locally in your browser, with no data sending.

Are images recompressed during transfer?

No. FileVert never modifies your files by default. The compressor is an optional tool you use before transfer.

Are there file or size limits?

No. There are no imposed limits. You can process as many files as needed.

Can I optimize a complete folder with its subfolders?

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

Can resize be applied to an entire folder?

Yes. Smart resizing can be applied automatically to all images in a folder in a single operation.

Is there advertising or tracking?

No. No tracking, no advertising, no marketing cookies.

Do I need to create an account?

No. The tool is usable immediately, without registration or account.

How to compress images in bulk without sending them to a server?

With FileVert, you can compress images in bulk directly in your browser. Drag and drop a complete folder or select multiple images, then choose your compression format (JPEG, PNG, WebP, AVIF). Everything is processed locally, no data is sent to a server.

How to reduce the weight of a JPEG image for the web?

Use the FileVert compressor to reduce the weight of your JPEG images. Select the JPEG format and adjust the quality according to your needs. Processing is done locally in your browser, with no visible quality loss for optimal web use.

Can we compress a complete folder of images without registration?

Yes, absolutely. FileVert allows you to compress a complete folder of images with its entire structure, without any registration or account creation. The tool is usable immediately, 100% locally in your browser.

How to resize an image without losing quality?

The FileVert compressor allows you to resize your images with an intelligent algorithm that preserves visual quality. You can reduce image size (width, height) while maintaining proportions and minimizing quality loss. Resizing is done locally in your browser, without sending to a server.

How to resize images in bulk?

To resize images in bulk, import a complete folder into the FileVert compressor. Smart resizing can be applied automatically to all images in the folder in a single operation. You get the same structure with all your resized images, without having to process each photo individually.

Can we resize photos without sending them to a server?

Yes, absolutely. With FileVert, you can resize your photos directly in your browser, without any sending to a server. All processing (resizing and compression) is done locally on your machine, ensuring total privacy.

How to reduce the size of an image for the web?

To reduce the size of an image for the web, use the FileVert compressor: select your image, choose an optimized format (WebP or AVIF for better compression), adjust quality and resize if necessary. Processing is done locally, with no visible quality loss for optimal web use.

Can I use FileVert as a free photo compressor?

Yes. FileVert works as a free photo compressor in your browser. Compress JPEG, PNG, WebP and AVIF photos in bulk without uploading them to a server, without registration and with no file size limit.

How do I compress a RAW file (CR2, NEF, ARW, DNG) to AVIF or WebP?

Drop your RAW file into the compressor, choose AVIF or WebP as the output format, then start compression. The tool extracts the embedded JPEG preview from the RAW container, processes it locally in your browser, then encodes to your chosen format. This is not full RAW development: resolution matches the preview built into the file by the camera.

Are RAW files compressed at full sensor resolution?

No. Without demosaicing, we use the largest embedded JPEG preview in the file (often between 1,600 and 6,700 px depending on the model). This suits quick previews, WebP/AVIF conversion or lightening files before sending. For full-sensor archive quality, export first from your photo software (Lightroom, Capture One, etc.).

Free image compression and resizing tool, 100% local in browser, no signup, to prepare your files before sending, web publishing or archiving.