Fast · private · no installation

Edit your files without uploading them to any server

Compress images, organize PDF, transform text, video and audio directly in your browser. Luna4 does not receive your files.

More than 20 toolsProcessing on your deviceNo account to startWorks on mobile

Compress an image Join PDFs See Luna4 Pro

Verifiable privacy, not an empty promise

The work happens inside your browser. You keep the original file and decide which result to download.

1You choose the file on your device2Your browser does the work3You download the result without uploading it

Images

Edit and optimize images

7 tools

Compress images

Reduces the weight of one or more images while preserving their visual quality.

New

Resize

Changes the width and height in pixels while maintaining the proportion.

Crop image

Select the exact area you want to keep undeformed.

Convert format

Converts an image or batch between JPG, PNG, and WebP.

New

Twist and Flip

Corrects the orientation or creates a horizontal or vertical reflection.

New

Watermark

Add text with custom position, size, color, and opacity.

Remove background

Removes backgrounds connected to the edges and creates a transparent PNG.

PDF

Organize documents PDF

4 tools

Join PDFs

Combine documents, change their order, and download a single PDF.

New

Split PDF

Separates each page into an individual PDF file.

New

Rotate PDF

Rotate all pages 90, 180, or 270 degrees.

New

Images at PDF

Converts multiple images arranged into a document PDF.

Text

Write and transform text

3 tools

New

Count words

Counts words, characters, phrases and reading time.

New

Uppercase and lowercase

Transforms text to uppercase, lowercase, title, or sentence.

New

Clear text

Removes spaces, empty lines, and duplicate content.

Video

Create from your videos

2 tools

New

Extract frame

Saves as JPG the exact moment of a video.

New

Video to GIF

Converts a short video clip into an animated GIF.

Audio

Edit audio files

3 tools

New

Trim audio

Select the start and end and download the fragment to WAV.

New

Join audios

Combine multiple tracks in the selected order.

New

Audio to WAV

Convert compatible audios to a universal WAV file.

Utilities

Quick Utilities

3 tools

New

Create code QR

Generates a downloadable QR for any link or text.

New

Generate password

Create random, strong passwords on your device.

New

Format JSON

Validate, sort or minify code JSON quickly.

Learn

Guides to solve real tasks

See all 30 guides

PDF

Join PDF without uploading files

Merge private documents in the correct order.

Video

Convert a video to GIF

Choose appropriate duration, resolution, and motion.

Audio

Trim audio online

Select the exact fragment and download it.

Utilities

Create a free QR code

Generate, check, and download a readable QR.