Merchmint

Chrome extension · v1.0.0

Queue the prompts.
Come back to numbered files.

Merchmint runs image and video generation in your own Google Flow account, unattended. Every result is upscaled and downloaded with a filename you can sort — so a hundred listings are a batch, not a hundred sittings.

Add to Chrome See how it works

Free tier: 30 prompts/day · No card required

How it works

You stay in your own Google Flow account.

Merchmint does not generate anything itself. It drives the Flow tab you are already signed in to — the same requests you would make by clicking Generate, issued in order, without you sitting there.

  1. 01

    Sign in

    Sign in with Google so your plan follows you across devices. Your password is never seen by Merchmint.

  2. 02

    Open Flow

    Open Google Flow in a tab, with a project open — the panel tracks both conditions and tells you which one is missing.

  3. 03

    Load prompts

    Paste your list, or import a .txt or .json file. One line, one generation — a live counter shows what was parsed before you spend anything.

  4. 04

    Set and run

    Pick model, aspect ratio and speed, then start. Merchmint queues the batch and paces the requests.

  5. 05

    Collect

    Results upscale and download automatically, numbered in order. Export the batch as a ZIP if you prefer.

What it does

Built for volume, not for one-offs.

Batch image generation

Nano Banana Pro, Nano Banana 2 and Nano Banana 2 Lite, across 16:9, 4:3, 1:1, 3:4 and 9:16.

Batch video generation

Omni Flash and Veo 3.1 in Lite, Fast and Quality. Text, start frame, start-and-end frame, or reference-driven.

Per-prompt references

Map a different reference image or start frame to each prompt, so one batch can cover an entire product line.

Chained generations

Each image becomes the reference for the next prompt. For video, the last non-blank frame becomes the next clip's start frame — up to 30 segments.

Automatic upscale and download

Results upscale and save themselves as 001.png, 002.png — numbered so they sort correctly. Or use prompt-based names, a custom prefix and a starting number.

Backs off instead of burning your list

If Google rate-limits you, Merchmint halves its concurrency and doubles its cooldown, then earns the slot back after two clean minutes. After 15 consecutive failures it stops rather than spending the rest of your queue.

A queue that survives mistakes

Batches freeze the settings they will run with. Retry only what failed, edit a pending prompt inline, delete with a 6-second undo, and export or import the queue as JSON.

Local library and gallery

Up to 500 reference images as on-device thumbnails, and a gallery of up to 3,000 items storing URLs and ids — never image bytes. Nothing is uploaded to us.

On-device

Failures that explain themselves

When reCAPTCHA stops accepting the page's tokens, Merchmint reloads the project, then makes a fresh one, then shows you the manual fix. Every failure ends in a reason on screen, not a spinner.

Some options belong to Google, not to us

Four options need both Merchmint Pro and a Google AI Ultra plan on your own Google account: 4K image upscale, 4K video upscale, and the two lower-priority Veo 3.1 models. Two more limits come from the models themselves rather than your plan — 4-second and 6-second durations need either Omni Flash or Ultra, and 10-second clips are Omni Flash only.

Merchmint cannot unlock what Google sells. Where an option is unavailable the panel shows it struck through with the specific reason, rather than letting a batch fail halfway.

Be aware, for version 1.0.0

Merchmint ships without the Google API key that would let it read which Google AI tier your account is on. That key belongs to Google, not to us, so we do not redistribute it. The practical consequence is blunt: in 1.0.0 those four Ultra-gated options stay locked for everyone, including Google AI Ultra subscribers, and 4-second and 6-second durations are reachable only through Omni Flash. Everything else works normally. Buying Pro will not unlock them, and the panel says so rather than selling you an upgrade that would not help.

Pricing

One plan, or none.

Generations consume your own Google Flow quota either way. Merchmint charges for the automation, not for the AI.

Free

$0

30 prompts per day

  • Every model and aspect ratio
  • Batch queue and auto-download
  • Reference library and gallery
  • No card required

Pro

$3 / month

or $29 / year (USD)

  • No daily prompt cap from Merchmint
  • Everything in Free
  • Plan follows your Google account across devices
  • Cancel any time from inside the extension
Get Merchmint

Billing by Stripe. See billing terms.

What Pro does not do

Pro removes Merchmint's daily cap. It does not give you more Google capacity — every generation still runs on your own Google account against your own quota — and it does not unlock the Ultra-gated options, which in version 1.0.0 are locked for everyone. If you are considering Pro for 4K, read §6 of the terms first.

Questions

The ones worth asking first.

This is a starting point. The full FAQ covers billing, refunds, data retention and account questions too.

Is Merchmint affiliated with Google?

No. Merchmint is an independent tool and is not affiliated with, endorsed by, or sponsored by Google. Google Flow, Veo, Nano Banana and related marks belong to Google.

Does it use my Google quota or give me extra capacity?

It uses yours. Every generation runs through your own Google Flow session and counts against your own Google quota. Merchmint gives you no access your Google account does not already have, and it stops when Google reports your limit.

Does it bypass reCAPTCHA or any of Google's limits?

No. It calls the Flow page's own already-loaded reCAPTCHA instance with the page's own public site key — the same call the Flow web app makes for itself. It does not solve challenges, does not use a solving service, and does not suppress a challenge if Google shows one.

Do you see my prompts or my images?

No. Prompt text goes from your browser to Google and only to Google. Generated images and videos exist between your browser and Google. Neither is sent to our servers in any form, including in error reports. The privacy policy lists exactly what our backend does receive.

What happens if Google changes how Flow works?

Generation could break. Merchmint automates endpoints Google does not publish or support, so Google can change or block them at any time without notice. The extension is built to report that as a clear on-screen reason rather than hang — but it cannot prevent it. Read §4 of the terms before subscribing if this matters to your workflow.

What do I need to run it?

Chrome 116 or newer, a Google account with access to Google Flow, and a Flow tab open with a project. Merchmint's entire interface is a side panel.

Can I use it on more than one device?

Yes. Your plan is tied to the Google account you sign in with, so it follows you. Your queue, gallery and reference library are stored per-device and do not sync.

How do I cancel?

Open Manage Subscription in the extension, which takes you to Stripe's billing portal. You keep Pro until the end of the period you already paid for. Details in billing terms.

Why does it need the permissions it asks for?

Each one maps to a single job: sign-in, the side panel itself, running requests inside your Flow page, saving your settings and queue on your device, finding your Flow tab, downloading results, and re-checking your subscription after checkout. The full list and the reason for each is in the privacy policy.

Is there an analytics opt-out?

Not currently. We collect feature-usage analytics and there is no setting to turn it off. We would rather say so plainly than bury it — see the privacy policy for exactly what is recorded.