I Rebuilt My Bulk AI Image Generator — It Now Runs 1000+ Images in One Go Without Breaking Character

The first version of this tool did one job: take a list of prompts and turn them into images without making you paste each one by hand. That solved the boring part. It did not solve the two things that actually ruin a bulk run.

The first was consistency. If you're making a forty-frame doodle explainer or a storyboard, the little stickman in frame 1 needs to still be the same stickman in frame 39. Most bulk generators treat every prompt as a stranger, so you end up with forty different art styles and a set you can't use.

The second was failures. Anyone who has queued a few hundred prompts on a free image API knows the feeling — you walk away, come back, and a dozen slots are empty with no way to fix them except starting the whole thing over.

The updated Bulk AI Studio on ShaheerTools fixes both. It runs on Gemini 3.1 Flash, holds a single character across an entire batch, retries whatever fails, and hands you the finished set as one ZIP. I've pushed it well past a thousand images in a single queue during testing, and it held together. It's still free, still browser-only, and still doesn't ask you to make an account.

What a bulk AI image generator actually is

A bulk AI image generator takes a list of text prompts instead of one, then works through the whole list in a single continuous run while you do something else. You queue once, and results fill in progressively on screen.

That sounds like a small convenience until you count the real cost of the alternative. Generating fifty images one at a time in a chat interface means fifty prompt pastes, fifty waits, fifty downloads, and fifty chances to lose your place. Now imagine a thousand. On a batch tool, the same job is one paste and one download — the time saved isn't a percentage, it's the difference between a week of clicking and a single unattended run.

What's new in the updated version

Character Consistency Lock

This is the headline change. Turn the toggle on before you start a run, and the studio carries the same character identity, style, line weight, and colour treatment across every prompt in the queue — whether that queue is twelve prompts or twelve hundred.

It's the feature that makes bulk generation usable for actual projects rather than random single images. A doodle explainer series, a children's book, a comic strip, a product mascot appearing across thirty scenes, a thumbnail set that needs to look like it came from one channel — all of these die without consistency, and all of them work now. In my own long-run tests, the same flat-colour stickman explainer style held from the first image to the last with no per-prompt babysitting.

Retry Failed — and far fewer failures to begin with

Two things happened here. The generation pipeline itself got much more stable, so failures now sit at a small fraction of what they used to be, even on four-figure batches. And when something does fail, it no longer costs you anything: a live counter shows exactly how many slots failed, and a single Retry Failed button re-runs only those, leaving every finished image untouched.

That's the part people underestimate. Re-running a handful of failures out of a thousand takes seconds. Re-running the whole batch because you have no other option can cost you an entire session.

Three ways to feed the queue

List is the classic mode — one prompt per line, paste as many as you want. The counter reads your input live and tells you how many prompts it detected, so you catch a broken line break before you commit a thousand-prompt run.

Matrix is for variation testing, and it's how big batches get built fast. Instead of writing out every combination by hand, you define the parts that change and the studio multiplies them out into a full prompt grid. Ten subjects across ten styles across ten camera angles is a thousand prompts you never had to type.

AI Ideas is for the days when you know the concept but not the wording. Describe the set you want and it drafts the prompt list for you, ready to edit before it runs.

There's also a starter preset pack if you'd rather begin from something proven, a Load TXT / CSV option if your prompts already live in a spreadsheet — which is usually how thousand-line lists arrive — and AI Polish Prompts, which rewrites a thin list into something descriptive enough to actually produce good images.

Reference Image (img2img)

Drop in one reference and the whole batch inherits from it. Useful when you have an existing brand illustration, a colour palette, a character sheet, or a rough sketch and you need an entire set built in that same direction rather than described from scratch.

A control panel built for long runs

The right side of the studio is a live batch monitor, and on a thousand-image run you genuinely need one. You get a progress bar with a real count and percentage, an ETA, a running images-per-second rate, and separate counters for total, done, in-queue and failed. You can pause mid-batch and resume later, filter the gallery by All / Done / Queue, select multiple results, clear finished items to keep the view manageable, and delete individual images you don't want in the export.

Every card in the gallery is labelled with its prompt, its model and its aspect ratio, so even a four-figure sheet stays navigable.

Download All (ZIP)

One button, whole batch, high resolution, no watermarks. Individual downloads are still there for when you only want three of the sixty.

How to run your first batch

Open the studio and pick your prompt source. If you're pasting, one prompt per line is all the formatting it needs — check the detected-prompt count underneath to confirm it read your list correctly. If your prompts are in a spreadsheet, load the CSV instead and skip the paste entirely.

Before you press start, decide on your generation options. Switch on Character Consistency Lock if the images belong to one series, add a reference image if you're matching an existing look, and set your aspect ratio. Getting these right up front is what separates a batch you can use from a batch you have to redo — and at a thousand images, redoing is not a small thing.

Then add the prompts to the batch queue and start generation. Results land in the gallery as they finish, so you'll know within the first few images whether your style direction is working. If it isn't, pause, fix the prompt list, and restart rather than waiting out the full run.

When it's done, glance at the failed counter. If it's above zero, hit Retry Failed and give it a moment. Then take the ZIP.

See a real large batch in action

Rather than just describe the output, here's an actual shared session from one of my long runs — a single continuous batch with one consistent doodle-explainer character holding across every frame.

Who this is for

Content creators building a whole quarter of visuals in one session. Explainer-video and faceless-channel makers who need hundreds of frames in one locked art style. Storyboard artists and comic creators, who care about the consistency lock more than anyone. E-commerce sellers producing mockup variations across an entire catalogue. Educators illustrating worksheet sets. Dataset builders who need volume with a controlled look. And designers using Matrix mode to test a hundred visual directions side by side instead of guessing at three.

Prompt tips that matter more at scale

At bulk scale, prompt discipline pays back a thousand times over. Write the style once and keep it identical across every line — same style phrase, same lighting phrase, same rendering phrase — and change only the subject and action. That, combined with the consistency lock, is what makes a set look designed rather than assembled.

Be explicit about framing too. "Medium two-shot," "wide low-contrast shot," "medium-wide eye-level" — naming the shot in every prompt is how you get a batch that cuts together like a storyboard instead of a pile of unrelated pictures.

And always run a five-prompt test batch before committing a thousand. Thirty seconds of checking is the cheapest insurance in this entire workflow.

Frequently asked questions

Is it still free?

Yes. No subscription, no credits, no API key, no sign-up.

How many prompts can I queue at once?

There's no hard cap. I've tested well past 1000 prompts in a single continuous batch without issues.

What does Character Consistency Lock actually keep consistent?

Character design, art style, line weight and colour treatment across the entire queue — so the whole batch reads as one set.

What if some images fail?

Failures are rare now, and the Retry Failed button re-runs only the failed slots without touching finished images.

Can I use my own image as a starting point?

Yes — add it under Reference Image (img2img) and the batch inherits its look.

Do I have to sit and watch a long run?

No. Start it, leave the tab open, and come back to a finished sheet. You can also pause and resume mid-batch.

Does it work on mobile?

Yes, it's a browser tool. Very long runs are just easier to monitor on a bigger screen.

Can I download everything at once?

Yes — Download All (ZIP), full resolution, no watermarks.

Are the images usable commercially?

Generally yes for most use cases, but AI image rights are still evolving, so check the rules in your own region before commercial use.

Ready to try it? Open the Bulk AI Studio →