Features

Everything that turns an artifact into a finished, deliverable clip.

A real transparent background. A frame-perfect engine. No-code restyling. Cinematic motion blur. Most of what would be a roadmap is already in the build — here’s the whole shelf.

5ProRes flavors
αTrue alpha channel
60True fps + NTSC
2–16×Motion-blur samples
The headliners

Four reasons the pros switch.

The alpha moat

Everyone else gives you a video. Renderkiln gives you a layer.

Export a real transparent background — ProRes 4444 with true alpha — and your lower thirds, logo stings, and titles drop straight onto a timeline over live footage. No green screen, no keying, no baked-in background. It’s the single feature that turns an AI artifact into something a professional editor can actually use.

  • ProRes 4444 with straight or premultiplied alpha
  • Grayscale luma matte for the Fill + Matte workflow
  • Knock out any color into real transparency
  • See it over a checkerboard in the live preview
The engine

Flawless — every single frame.

A screen recorder samples in real time and drops frames the moment your Mac gets busy. Renderkiln renders each frame deliberately and keeps it only once it’s perfect. The motion is buttery, the gradients are clean, and the same artifact renders the same file every time.

  • No dropped frames, even at a true 60 fps
  • Clean gradients and accurate, tagged color
  • Byte-for-byte identical on every render
  • Test fire a one-second proof before you commit
No-code restyle

Make it yours before you render — no code.

Recolor it to your brand, rewrite the text, hide a stray element, or swap the background — all before capture, with a live preview. Then bake your changes into a clean new HTML. It re-applies every frame, so even animations that redraw themselves stay tweaked.

  • Detect the real palette, then remap colors on-brand
  • Find-and-replace text to localize or personalize
  • Hide watermarks, player bars, or a stray cursor
  • Custom CSS escape hatch + bake-to-HTML export
Cinematic finish

Real motion blur, because it owns the clock.

Renderkiln renders several sub-frames per output frame and blends them into true temporal motion blur — the soft, filmic shutter that makes motion feel shot, not stepped. Screen recording physically can’t make it, and cloud tools don’t try.

  • 2–16× temporal supersampling
  • The cinematic shutter look, on demand
  • Pairs with NTSC rates and 10-bit color
  • Only possible because the engine controls time
The complete shelf

And everything else, in full.

Six groups, top to bottom — the depth behind the headlines.

Formats & codecs

Pro codecs, your call.

Quality and size estimates before you commit — and a disk-space pre-check so a 6 GB render never surprises you.

ProRes 422 family + 4444

Proxy, LT, 422, 422 HQ, and 4444. Render ProRes and MP4 together in one pass.

H.264 & HEVC

Quality control on both, with optional 10-bit HEVC for deep gradients.

Up to 4K UHD

4K UHD, 1080p, 720p — with live output size estimates per setting.

True 60 fps + NTSC

24 / 30 / 60, plus NTSC fractional rates (29.97 / 23.976 / 59.94) with exact timescales.

Color management

Tag output Rec.709 / sRGB / Display P3 / Rec.2020 HLG so it behaves in a real pipeline.

Trim

Render just an in/out slice of the timeline when you only need the good part.

Alpha & transparency

A layer, not a video.

The feature that turns an AI artifact into something an editor can actually use.

ProRes 4444 with true alpha

Straight or premultiplied alpha that Premiere, Resolve, Final Cut, After Effects, and Motion all read natively.

Luma matte export

A tiny grayscale …-matte.mp4 for the Fill + Matte track-matte workflow — without the giant 4444 file.

Knock-out color

Capture a transparent background, or knock out a chosen color into real alpha.

Checkerboard preview

See transparency over a checkerboard in the live preview before you render — no guessing.

Pre-render tweaks

Fix it before you render it.

No-code edits applied before capture — and re-applied every frame, so even animations that redraw stay tweaked.

Hide elements

Kill the player controls, a watermark, or a stray cursor baked into the animation.

Detect colors → spot swaps

One click pulls the artwork’s real palette into swatches; recolor on-brand by remapping several at once.

Text find / replace

find => replace, one per line — for localization and personalization.

Custom CSS

The escape hatch for anything else, injected before capture.

Motion blur

Temporal supersampling (2–16 samples) for a cinematic shutter only a clock-owning engine can make.

Bake to new HTML

Export a clean, self-contained .html with your tweaks applied — plays anywhere, re-imports to Claude Design.

Finish & deliver

A postable video, not just footage.

One app for the timeline, the web, and the chat thread.

Audio (in the v1.0 sprint)

Music + voiceover muxed on, with per-track volume, auto-ducking, and text-to-speech from a transcript.

GIF / APNG / poster

Animated GIF and alpha-aware APNG plus a poster still, written straight from the frame-perfect stream.

Image sequence

Every frame as PNG or TIFF, alongside or instead of the video — the clean After Effects ingest.

Social pack

Render 16:9, 1:1, and 9:16 in one click.

Batch & watch-folder

Queue many files, or drop HTML into a watched folder and get ProRes back automatically.

Presets

Built-in delivery presets plus save / recall / import / export of named presets (full settings + tweaks).

The workshop

Made like the work it makes.

The identity layer, all shipped — features a rival can clone, a point of view it can’t.

The Cooling Rack

Every render is a numbered, fired object that cools amber → ceramic. A maker’s mark in a single serif.

Test fire

Hold ⌥ for a one-second proof slice from the middle of the timeline, straight into Quick Look.

The Dock kiln

The Dock icon glows hotter as the render climbs; an optional menu-bar ember tracks long renders.

Live preview

Play the animation in real time with your tweaks applied before committing a render.

Edit-bay transport

J/K/L transport, frame-step, loop, volume, and SMPTE timecode (MM:SS:FF).

Drag the fired tile out

Drag the result to Finder/FCP/Premiere/Resolume — the poster-framed object, not a generic file icon.

Native & private

It’s processed on your device, not a server.

Cloud tools upload your work to a remote server to render it. Renderkiln does all the work locally — nothing to install, nothing to configure, and none of your content uploaded.

On-device, always

Renders and encodes right on your Mac, using built-in macOS frameworks. No upload, no queue, no server processing your unreleased work.

Nothing to install

No plug-ins, no command line, no technical setup. One native app you just open and use.

Identical every time

Render the same artifact twice and get the same file — what you approve in the preview is exactly what ships.

Never a broken file

A cancelled or interrupted render cleans up after itself — it never leaves a half-written clip masquerading as finished.

Accessible

WCAG 2.1 AA, VoiceOver narration of each firing, and Reduce Motion rendered as temperature instead of motion.

Batch & automate

Queue a whole folder of artifacts, or wire Renderkiln into the rest of your pipeline. Deeper automation is on the roadmap.

Fire your first one.

Drag in an animation. Get a frame-perfect, broadcast-grade file with a real transparent background — on your Mac.

Join the beta How it works →