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Free Video Upscaler – Enhance Videos to 4K

How to use
WORKSPACE / IMAGE UPSCALE

A LITTLE AI. A LOT MORE DETAIL.

Bring every pixel
into focus.

Rediscover the details. Turn your images into crisp, high-resolution originals.

MAKE ROOM FOR MORE8KMAX OUTPUT RESOLUTION

A little drop. A big upgrade.

Drag your images here, or choose from your device.

PNG, JPG, WebP, BMP, TIFF · Up to 50 MB each One file or a whole collection. Batch upload supported.
Sharper by nature

Recover the detail that matters.

Always in your hands

Your media stays on your machine.

One or many

Make light work of your entire batch.

Upscale images online for free with AI

Lumio Studio is a free image upscaler that makes small or blurry photos larger and sharper. Enlarge a picture 2x or 4x – up to 8K resolution – for printing, product listings, wallpapers or presentations. There is no watermark and nothing to install, and most photos are processed right in your browser, so they never leave your device.

  • Free, no watermark

    Upscale as many photos as you like. Results download clean, without logos or credits.

  • Up to 8K resolution

    Enlarge images 2x or 4x, up to 7680 pixels on the longest side.

  • Private by design

    Fast Upscale and AI Upscale run on your device, so your photo is not uploaded.

  • Batch upscaling

    Drop in a whole folder of images and download every result at once.

How to upscale an image

  1. Choose a photo

    Drag a JPG, PNG, WebP, BMP or TIFF image into the box above, or pick several for a batch.

  2. Pick a mode and scale

    Fast Upscale finishes almost instantly. AI Upscale adds the most detail and takes a little longer. Choose 2x or 4x.

  3. Compare and download

    Slide between the original and the result, then download your high-resolution image.

Frequently asked questions

Is this image upscaler really free?

Yes. Upscaling images on Lumio is free, with no watermark, no credits and no subscription.

Do I need an account?

Fast Upscale and AI Upscale work without an account. Features that use our server, such as Clean Up, ask you to sign in with a free account.

Are my photos uploaded to a server?

Not with Fast Upscale or AI Upscale – the image is processed in your browser. If your device cannot handle a file, Lumio uses its server instead, and server files are deleted automatically.

How large can the upscaled image be?

Up to 8K: the longest side can reach 7680 pixels. Choose 2x or 4x depending on the size of the original.

Which mode should I choose?

Fast Upscale is best when you need a bigger image quickly. AI Upscale redraws fine detail for the sharpest result. Clean Up removes blur and noise without changing the size.

Can AI restore details that are completely lost?

Not exactly. AI makes an image look much sharper, but it can invent fine textures. Check faces and text against the original before you publish.

Read the full image upscaling guide → Xem bằng tiếng Việt

WORKSPACE / VIDEO UPSCALE

A LITTLE AI. A LOT MORE DETAIL.

A clearer view.
Frame by frame.

Give your footage a fresh perspective with sharper detail and higher resolution.

MAKE ROOM FOR MORE4KMAX OUTPUT RESOLUTION

A little drop. A big upgrade.

Drag your videos here, or choose from your device.

MP4, MOV, WebM, MKV, AVI · Up to 200 MB each One file or a whole collection. Batch upload supported.
Sharper by nature

Recover the detail that matters.

Always in your hands

Your media stays on your machine.

One or many

Make light work of your entire batch.

Upscale videos to 4K online for free

Lumio Studio is a free online video upscaler that turns low-resolution clips into sharper, higher-resolution video – up to 4K. It works right in your browser with no watermark and no software to install. Most MP4 and MOV clips are processed on your own device, so your footage stays private.

  • Free, no watermark

    Upscale your clips without logos, credits or a subscription.

  • Up to 4K output

    Enlarge video 2x or 4x, up to 3840 pixels on the longest side, with the original audio kept.

  • Runs in your browser

    Fast Upscale uses your GPU and hardware video encoder, so supported clips are never uploaded.

  • Preview before saving

    Watch the upscaled result, compare file sizes, then download it.

How to upscale a video

  1. Choose a video

    Drop an MP4 or MOV clip (up to 1 minute) into the box above. MKV, WebM and AVI files are supported too.

  2. Pick a mode and scale

    Fast Upscale is the quickest. AI Enhance improves every frame with AI and takes longer. Choose 2x or 4x.

  3. Preview and download

    Keep the tab open while it works, then preview the result and save your sharper video.

Frequently asked questions

Is the video upscaler free?

Yes. Lumio upscales videos for free, with no watermark and no subscription.

How long can my video be?

Each clip can be up to 1 minute long. Files that must be processed on our server can be up to 200 MB.

Is my video uploaded?

Most MP4 and MOV clips are processed in your browser and never leave your device. Other formats, or devices that cannot handle the file, use our server after you sign in; those files are deleted after you download the result.

Can I upscale a video to 4K?

Yes. Lumio can output up to 4K (3840 pixels on the longest side). A clean, well-lit source gives the best result.

Why do I need to keep the tab open?

When the video is processed in your browser, closing or reloading the tab stops the job. Lumio warns you before you leave.

Does upscaling to 4K add real detail?

Upscaling makes video look sharper and cleaner, but it cannot fully recover detail the original never captured.

Read the full video upscaling guide → Xem bằng tiếng Việt

Drop a song here

AI splits it into vocals and instrumental

MP3, WAV, FLAC, M4A, OGG • karaoke & acapella maker

Drop a recording here

AI removes background noise from speech

Podcasts, voice memos, interviews, video voice-overs

Drop a track here

one-click automatic mastering, right in this window

Measures the track, decides every setting, explains each choice

Drop an MP3 or WAV here

view every metadata tag, then strip them all losslessly

Byte-level surgery — the audio comes out bit-for-bit identical

Drop noisy or blurry images here

or click to browse — multiple files for batch mode

PNG, JPG, WebP, BMP, TIFF • Max 50MB each

Drop an image here

then brush over anything you want gone

People, wires, trash, photobombers • Max 50MB

Drop an old photo here

colorize black & white, restore faces, recover detail

PNG, JPG, WebP, BMP, TIFF • Max 50MB

Drop a video here

clean the audio, remove music, compress, or make a GIF

MP4, MOV, WebM, MKV • Max 2GB