Is it free? Is there a watermark, a sign-up or a length limit?

It's free, with no account needed and no watermark, and exports keep the full resolution. There is no fixed limit: the editor warns before a file over 4K, a video ten minutes or longer or an export likely to pass 2 GB, and a photo too large for your device's graphics card is scaled down, with a note saying so.

Is my video uploaded?

No. It opens, plays and exports on your own device, so it never leaves your browser. The site counts visits and a few choices, such as the format you export to, but never your file or its name.

Is bloom the same as a glow effect?

Bloom is a glow from the bright parts of the picture. It isn't a neon, outline or text glow drawn round shapes or letters.

What's the difference between bloom and halation?

Bloom is a soft glow in the light's own colour; halation is a red-orange ring round highlights, as on film. The editor has both, and they work together.

Why can't I see any bloom?

Only the parts brighter than Threshold glow. Lower Threshold, raise Amount, or try a shot with bright light against darker surroundings.

Why does my video look washed out?

Too much light is being added. Lower Amount, or raise Threshold so only the brightest parts glow.

Will bloom blur my video?

No. It adds a glow round the bright parts; the picture underneath keeps its detail.

Can I change the glow's colour?

No. The glow takes the colour of the light it comes from. For a red-orange glow, add Halation; Temperature and Tint in Light and colour, or your own LUT, change the colour of the whole picture.

Can I add bloom to a photo?

Yes. Open a JPEG, PNG, WebP, AVIF photo the same way and export it as PNG, JPEG or WebP (where the browser can write WebP; Safari can't) at full resolution.

Which browsers and phones does it work in?

Chrome or Edge 111 or later on a computer or Android, Safari 26 or later on a Mac, iPhone or iPad, and Firefox 130 or later on a computer. Firefox for Android handles photos only.

Bloom effect for video and photos

Add a soft glow that spreads from the brightest parts of the frame, set it with the sliders and compare it with the original, then open your own video or photo and export it at full resolution. It runs in your browser: your file is never uploaded.

Free
No upload
No account needed
No watermark
MP4, WebM, PNG, JPEG, WebP

Linen curtains on a driftwood frame over coastal grass at golden hour, a soft glow spreading round the low sun on the right half of the frame.

Bloom

Amount

Threshold

Radius

Open your own file Open this look in the editor

How to add a bloom or glow to a video online

Open your video or photo
Choose Open your own file: the editor opens with the effect, ready for your file (videos as MP4, MOV, M4V, WebM, MKV; photos as JPEG, PNG, WebP, AVIF). It opens in your browser, and nothing is uploaded.
Set the glow and compare
Amount sets how strong the glow is, Threshold how bright a part of the picture must be to glow and Radius how far it spreads. Compare shows the original beside the result; play a video to see the glow follow the light.
Export it
In the editor, export the video as MP4 or WebM, or the photo as PNG, JPEG or WebP, at its full resolution, with no watermark.

Amount, Threshold and Radius

Amount sets how strong the glow is, from none at 0 to 100.

Threshold sets how bright a part of the picture must be to glow, from 0 to 1 in linear light: at 0 everything glows, at 1 only the source's whites, and the glow fades in over a soft range rather than switching on.

Radius sets how far the glow spreads, from 0.5 to 25% of the frame's shorter side, so it looks the same in the small preview, a 4K export and a vertical video.

A glow in the light's own colour

Bloom is light added in linear light, as real light adds, in the colour of the highlight it comes from: a low sun glows warm and a blue sign glows blue. It is added to the picture rather than blurred over it, so the picture keeps its detail under the glow.

On video it is worked out for every frame, so it follows the lights as they move, and the export matches the preview frame for frame.

Where bloom shows

Bloom needs bright light against darker surroundings: the sun behind a subject, backlit petals or hair, lights and neon at night, sparkle on water. On a flat, evenly lit shot there is little to glow: lower Threshold to let more of the picture glow, and keep Amount gentle so it doesn't wash out.

Bloom, glow, halation and mist

Bloom is the soft glow of a highlight's own light, round it and over it. Halation, a separate effect in the editor, adds a red-orange ring round highlights instead, as on film; the two share one glow, and the Night film preset uses both.

A neon, outline or text glow is drawn round shapes or letters, which bloom doesn't do, and a mist or diffusion filter softens the whole picture, while bloom spreads only its brightest parts.

Your files stay on your device

Everything happens right on your device, in your browser. Your videos and photos are opened, edited and saved there, and never sent anywhere.

Because nothing is uploaded, your files are safe: nothing can leak, and no one else, not even us, ever sees them. You don't need an account: one holds only your email address and the AI agents you let in, and signing in keeps a single cookie. An agent's instructions to your editor pass through our server and are deleted as soon as the editor has carried them out; your files never do. Without cookies, the site counts visits and a few choices, such as a preset or effect you pick and the format you export to, but never which files you open or anything in them.

Exports leave out hidden details such as where a video was recorded, and a shared link carries only your settings, never your file.

Files and browsers

Opens MP4, MOV, WebM and MKV videos and JPEG, PNG, WebP and AVIF photos, and exports MP4 or WebM, or PNG, JPEG or WebP, at full resolution, keeping the original sound where the browser can. Works in current Chrome and Edge on a computer or Android, in current Firefox on a computer and in Safari 26 or later; HDR video is converted to standard range.

Looks with bloom

Three of the editor's presets use bloom. Each opens the editor with its look:

Questions about the bloom effect

Choose Open your own file above to open the editor with the effect, open your video there, set Amount, Threshold and Radius, and export it as MP4 or WebM. In the editor, Bloom is under Add effect, and the Soft glow, Night film and Vintage lens presets include it.

More effects to try

See every effect