Bigjpg: our review
Bigjpg upscales photos and illustrations up to 16 times through a super-resolution neural network, with a dedicated mode for drawings and another for photos. Billed as a prepaid package rather than a subscription, with automatic deletion of images after processing.
What we take away from it
What counts in its favor
- A public, detailed "AI Transparency" page that explains how the model works (super-resolution through a convolutional neural network), what it doesn't do (no generation, no deepfakes, no face swapping), and states unambiguously that it doesn't use user images to train its models.
- Announced automatic deletion: within 24 hours for a free account, within 72 hours for a paid account — a short retention period stated plainly, rare at this level of detail in the category.
- One-off payment per package (2, 6 or 12 months of credits) rather than an auto-renewing subscription: no risk of forgetting to cancel.
What counts against it
- Images are stored on Alibaba Cloud (default server located in mainland China, with an option to switch to a US server only to speed up downloads) and pass through a content-moderation service from the same group — no European hosting option.
- No mention of the operating company, its legal form or country of registration on the legal pages: only a site and a contact email identify who runs the service.
An honest tool about training its models and about how long uploaded images live, but hosted on Chinese infrastructure and run by an operator whose legal identity stays invisible — best kept for non-sensitive visuals.
The facts
- First paid tier
- $6/month — Basic, one-time payment valid for 2 months (500 images/month), no recurring subscription
- Data hosting
- Data outside the EU · source
- Categories
- Upscaling and restoration
- Data verified on
- 30 July 2026
What happens to your data
- Is your data used to train their models?
- No
- Subprocessors
- The privacy policy and the "AI Transparency" page state that Bigjpg doesn't use images uploaded by users to train, improve or develop its foundation models, and that the models are trained on legally obtained datasets, separate from user content. Images are stored on Alibaba Cloud Object Storage Service and pass through the content-moderation service of the same group to detect banned content; no other subprocessor is named.
- Retention
- 24 hours after processing for a free account, 72 hours for a paid account, according to the privacy policy.
Bigjpg in detail
Bigjpg upscales images up to 16 times their original size through a super-resolution neural network, with two distinct modes: "art" for illustrations and drawings, "photo" for standard shots. It's one of the few tools in the category to publish a page dedicated to its AI transparency, letting you check in writing claims that most competitors leave as marketing promises.
What it actually does
You upload an image, choose the mode (art or photo), the noise-reduction level and the upscale factor (2x, 4x, 8x or 16x), and the result is ready within seconds to minutes depending on the server assigned to the account. An API with Python code examples is available to automate a batch of images rather than going through the interface one by one. The service also offers offline processing of the result once the image is retrieved, useful for anyone who wants to avoid downloading the same large file more than once.
Why it interests us
Two points set Bigjpg apart from the rest of the category. First, its honesty about training: the AI transparency page states plainly that user images aren't used to train the models, far from the norm among consumer tools in this family. Second, fast file deletion, 24 to 72 hours depending on the account, a short period stated publicly, compared with policies that stay vague on this point. That said, the company itself remains anonymous: no legal page names a registered company, which limits what a firm or a business can document if asked to account for its image-processing suppliers.
Where it falls short
Two reservations remain. The first concerns hosting: images pass through Alibaba Cloud, on a server located by default in mainland China, with a content-moderation service from the same group scanning uploaded files — no European alternative is offered, only a switch to a US server to speed up downloads. The second concerns the operator's identity: neither the legal notice nor the terms of use name a company, legal form or country of registration; only a site and a contact email identify who actually processes the data.
Our recommendation
To upscale illustrations or non-sensitive photos at low cost, without a recurring subscription, Bigjpg keeps its promises on model training and file deletion better than most comparable tools, and deserves a look in our directory of free tools. For identifiable documents or portraits that require a guarantee of European hosting or an identifiable legal contact, you're better off looking elsewhere.
Who it's for, and who it isn't
Suited for
- An illustrator or creator who wants to upscale drawings or artwork (dedicated "art" mode) without a monthly subscription
- Occasional use on non-sensitive photos, where a prepaid package of a few months is enough and fast file deletion is a real plus
Not a fit
- A firm or professional handling identifiable documents or portraits who must document European hosting: default servers are in China and the legal operator is identified nowhere
- Anyone who needs reliable, stable high-volume processing: the free plan caps at 20 images per month, 4x only, on a shared and slow server
Frequently asked questions
- Do my images train Bigjpg's AI?
- No, according to the privacy policy and the site's AI transparency page: uploaded images only serve to deliver the requested processing, and the models are trained on separate, legally obtained datasets.
- How long do my images stay stored?
- 24 hours after processing for a free account, 72 hours for a paid account, according to the privacy policy — an automatic deletion, not an option you have to enable yourself.
- Where are images sent to Bigjpg hosted?
- On Alibaba Cloud, with a default server located in mainland China; the user can switch to a server located in the United States to speed up downloading results, according to the indications published on the site, but no European hosting option is offered.
- How much does Bigjpg cost for regular use?
- The Basic package costs 6 US dollars for 2 months (500 images per month), the Standard package 12 US dollars for 6 months (1,000 images per month), and the Premium package 22 US dollars for 12 months (2,000 images per month), as a one-off, non-renewing payment, according to the pricing page reviewed in July 2026.
- Is there a free plan?
- Yes, 20 images per month, 4x maximum, on a slower shared server and with a file size capped at 5 MB — enough to test the result before buying a package.
Alternatives to Bigjpg
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Upscayl
Open source image upscaler that runs entirely on your machine.
Upscaling and restoration
Icons8 Smart Upscaler
Upscales images up to 7680x7680px using AI, with batch processing.
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Let’s Enhance
Upscales and cleans up an image too small for print.
Our sources
- Home page (full pricing grid)accessed on 30 July 2026
- Privacy policyaccessed on 30 July 2026
- AI transparency page (how the model works, training)accessed on 30 July 2026
- Terms of use (image ownership, refunds)accessed on 30 July 2026
Prices and hosting terms change often. We recheck them periodically, but the publisher's page remains the only up-to-date reference.