UpSynth
UpSynth is a browser-based AI image editor built around control: Upscale, Restore and Modify work area by area, each run returning four variants. Processing stays inside the EU and user images never train a model.
What is UpSynth?
UpSynth is a browser-based AI image service from Vienna, built to fix what its makers call the central flaw of automatic enlargement: doing it without control is a matter of luck. Faces change, details get misread, and when the result misses you start over. UpSynth answers with three tools that share one canvas and one workflow. Upscale enlarges an image while analysing it, reconstructing missing detail and reducing noise and artefacts, without distorting the character of the original. Restore works on a selection you draw yourself: it rebuilds a face, a hand or a fine detail from the source image and, in the publisher's own words, reduces creative liberties to a minimum. Modify takes a selection plus a written instruction and reworks only that area, swapping an object, removing an element or colourising a black-and-white photograph, without recomputing the whole picture. Sitting across all three is the Magic value, a dial for how much licence the AI is granted. At 50% it stays very close to the source; 100% is the recommended setting; 150% invents more freely, which the site itself flags as carrying more interpretation risk. Every operation returns four variants to pick from, and any step can be undone, which makes the tool iterative rather than a single gamble. The service accepts JPG, PNG and WEBP, runs entirely in the browser and needs no installation. Sign-in is passwordless through Google, Apple ID, Facebook or an emailed magic link, and the account is created on first login. Consumption is metered in credits, and plans also grant one, three or five concurrent workers, which caps how many jobs run at the same time. The data posture is unusually explicit for a tool of this size: only pre-trained open-source models are used, user images never train anything, and processing and storage happen on EU servers only, with Hetzner in Falkenstein for infrastructure and RunPod for GPU capacity in European data centres. UpSynth is the first product of Latent Space Rocket GmbH, and its showcases run from wedding photographs and portraits to movie posters, anime and game textures.
What it does
- Upscale an image while reconstructing missing detail and cutting noise and compression artefacts
- Restore a selected area, a face, a hand or a fine detail, faithfully to the source pixels
- Modify a selected area from a written prompt: replace an object, remove an element, change a detail
- Set how far the AI may go with the Magic value, from 50% conservative to 150% inventive
- Strip JPEG compression artefacts, with or without enlarging the file
- Revive faded or damaged photographs and colourise black-and-white shots
- Compare four generated variants at every step and step back whenever a result misses
When to use UpSynth / When not to
A quick filter to help you decide if UpSynth is the right fit.
When to use UpSynth
- Designers and art directors who need print-ready resolution out of small or heavily compressed source files
- Photo editors and photojournalists rebuilding faces and fine detail in old, scanned or downscaled pictures
- Illustrators and game artists enlarging artwork, anime, drawings and game textures without losing the original style
- Agencies and studios that must guarantee EU-only processing and that client images are never used for training
- Anyone reviving family photographs, wedding pictures or movie posters and willing to work area by area for accuracy
When not to use UpSynth
- Teams that want automation: there is no API, no developer documentation and no batch processing
- Photographers working in RAW, TIFF or PSD, since only JPG, PNG and WEBP are accepted
- Mobile-first users, as there is no iOS, Android or desktop application, only the browser
- Anyone expecting to generate an image from a text prompt alone, because every job starts from an existing file
- Organisations that require a signed data processing agreement, which UpSynth neither publishes nor offers
How to use UpSynth
A typical end-to-end flow, from setup to results.
- Sign in with Google, Apple ID, Facebook or an emailed login link: no password, and the account is created for you
- Upload a JPG, PNG or WEBP file in a high enough source resolution
- Pick the tool you need for this step: Upscale, Restore or Modify
- For an enlargement, set the target size and dial in the Magic value, 100% being the recommended starting point
- For Modify, outline the area with the Selection Tool and describe in the prompt what should change
- For Restore, draw a selection slightly larger than the face or detail to rebuild, then run it
- Wait for the job: progress is displayed and you are notified as soon as the result is ready
- Compare the four proposals and keep the one closest to the original
- Work one area at a time, repeating, refining or undoing steps rather than changing everything at once
- Download the finished image; projects and results stay in your account until you delete them
Pros & Cons
Pros
- Genuine control: area selection, adjustable Magic value, four variants per run and undo at every step
- Restore is built specifically for faces and fine detail, exactly where generic upscalers fall apart
- Processing and storage are EU-only, with no transfer to third countries claimed during processing
- User images never train a model; only pre-trained open-source models are run
- Subprocessors are named outright, Hetzner, RunPod, PostHog, Stripe and Paddle, which is rare at this scale
- Credits can be bought without any subscription and do not expire while the account exists
- Full legal identity published: company, Vienna address, register number, VAT ID, court and managing director
Cons
- No API and no developer documentation, so nothing can be automated or wired into a pipeline
- No mobile or desktop app and no batch mode: every image, often every area, is handled by hand
- Only JPG, PNG and WEBP are accepted, so no RAW, no TIFF and no PSD
- Refunds are generally excluded, and a credit is spent even when none of the four variants works
- No permanent free tier: only the very first operation is free of charge
- No data processing agreement is published or offered, which blocks some regulated professional use
- Accounts cannot be deleted without emailing support, replies take 24 to 48 business hours, and advanced guides are still only planned
Pricing & Plans
There is no permanent free plan; the first Upscale, Restore or Modify operation is provided free of charge. The lowest paid entry point is a one-off 200-credit pack at EUR 5.00, purchasable without any subscription. Subscriptions begin at EUR 20.00 per month with UpSynth Basic. Prices are displayed in euros or US dollars depending on region and language, and VAT is calculated and remitted by the payment provider Paddle.
- 1 concurrent worker
- 200 credits
- 5 standard upscales
- 2 large upscales
- 8 edits
- no commitment
- 1 worker
- 500 credits
- 12 standard upscales
- 5 large upscales
- 20 edits
- around 5% better value per credit
- 1 worker
- 1000 credits
- 25 standard upscales
- 10 large upscales
- 40 edits
- around 12% better value per credit
- 1 worker
- 1000 credits a month
- 25 standard upscales
- 10 large upscales
- 40 edits
- rollover up to 3x
- 3 workers
- 2250 credits a month
- 60 standard upscales
- 25 large upscales
- 90 edits
- about 7% better value than Basic
- 5 workers
- 11000 credits a month
- 300 standard upscales
- 125 large upscales
- 440 edits
- about 10% better value than Basic
- Actual upscale counts vary with image size and target resolution
- and purchased credits are always consumed before subscription credits
Data, GDPR & hosting
A consolidated view of how UpSynth handles your data.
GDPR overview
GDPR compliance is claimed explicitly and backed by concrete detail. Established in Vienna, UpSynth states it is fully subject to the GDPR. The controller is named in clause 1 of the privacy policy: Latent Space Rocket GmbH, Haussteinstrasse 2 / TOP 108, 1020 Vienna, FN 648252 m, support@upsynth.ai. Rights are listed article by article, from access (15), rectification (16) and erasure (17) to restriction (18), portability (20), objection (21) and complaint to a supervisory authority (77). Breach handling cites Articles 33 and 34 and the 72-hour deadline. Personal data is deliberately minimal, first name, last name, email, uploaded images and session data, with no passwords and no payment details stored. Analytics cookies (PostHog) are consent-based. Two gaps remain: no data protection officer is named, and no data processing agreement is published.
Who owns the data?
The terms are unambiguous: you retain full ownership of every image you upload and every result you produce. Latent Space Rocket GmbH takes only a non-exclusive, revocable and limited licence to process your files and make them technically available, and that licence ends the moment you delete the content or the account. Processing is automated and staff access is restricted: authorised personnel may open your content only for support, troubleshooting, platform security, abuse prevention, legal obligations or enforcement of the terms. The named subprocessors are Hetzner, RunPod, PostHog, Stripe and Paddle. The publisher also reserves the right to block, retain, review or report content that breaches the rules or the law.
Reuse rights
Because ownership never transfers, you can reuse, publish, print or sell what UpSynth produces without asking permission: the terms impose no commercial restriction, no revenue share and no attribution duty on your output, and your results stay accessible and downloadable even after a subscription is cancelled. The obligations run the other way instead. You warrant that you hold every right to what you upload and that no third-party right is infringed. The terms forbid illegal, violent or offensive material, deceptive or manipulated content, impersonation, spam and harassment, non-consensual sexual content, and anything involving minors or apparently young people in a sexual context, and UpSynth may remove or block such content.
Data retention & training
Hosting summary
UpSynth states that all images and data are processed and stored exclusively on servers inside the European Union, with no transfer to third countries during processing. The named infrastructure partner is Hetzner Online GmbH, operating from its Falkenstein data centre in Germany. GPU capacity comes from RunPod, a US-incorporated company that UpSynth says it uses only through European data centres, with RunPod's own compliance page (HIPAA, GDPR, SOC 2 Type 2) linked from the terms. PostHog provides anonymous usage analytics, and Stripe and Paddle handle payment, with no card data stored by the publisher. Jurisdiction is Austrian and the terms are governed by European Union law. Transfers run over TLS 1.2 or higher, and servers are described as protected by firewalls, access policies and regular security updates. An independent check is consistent with the claim: the site's IP address resolves to Hetzner Online in Falkenstein, Germany. What is missing is a data processing agreement, which is neither published nor offered, and a dedicated versioned subprocessor page.
Things to keep in mind
Risks and trade-offs to weigh before adopting UpSynth.
- The AI reinterprets: the site's own tutorials show faces and hands altered by a Modify pass and then rebuilt one at a time, so a family photograph can come back with a face that is no longer quite the person's
- At 150% Magic the tool is explicitly allowed to invent, and invented detail is presented exactly like reconstructed detail
- A restored archive photograph stops being a faithful record, and nothing watermarks or tags the file to say an AI touched it
- The terms shift the legal risk onto you: you warrant that you hold every right to whatever you upload
- Prohibited uses are policed, from deceptive or manipulated content to non-consensual sexual material, and the publisher may retain, review and report content
- Iterating until something looks right is comfortable enough to erode manual retouching skill and visual judgement
- Practical lock-ins: a rejected run still burns credits with no refund, the account depends on a third-party identity provider, and deleting it requires writing to support
Setup & Integrations
Technical difficulty
Setup is essentially nil. Everything runs in the browser, there is nothing to install, no API key and no configuration; sign-in goes through Google, Apple ID, Facebook or an emailed link, and the account creates itself on first login. The learning curve is editorial rather than technical: knowing how to draw a useful selection, how far to push the Magic value, how to phrase a Modify prompt and in what order to chain Upscale, Restore and Modify. The how-to pages give verbatim prompts and full step sequences, though the FAQ concedes that advanced guides are still planned.
Deployment
Integrations
Supported languages
Behind UpSynth
Resources
All the official URLs gathered for verification and reference.
Frequently asked questions
Are my images used to train AI models?
Where are my images processed and stored?
Do I need a subscription to use UpSynth?
What does it cost to get started?
Do my credits expire?
Which file formats are supported, and is there an API or a mobile app?
How long is my data kept?
Can I delete my account myself?
How do I sign in, and is there two-factor authentication?
How do I reach support?
Should you pick UpSynth?
UpSynth is a narrow product done deliberately: an upscaling and area-level retouching editor, not a general graphics suite. Its argument, that automatic enlargement is a gamble and that control is worth the extra clicks, holds up in the step-by-step tutorials, where restoring one photograph takes six passes and each face and hand is rebuilt separately. That is the honest trade. You get results you can steer, at the cost of manual work the one-click competitors do not ask for. The European positioning is more than a slogan. Latent Space Rocket GmbH publishes a full Austrian imprint, names its subprocessors, keeps processing and storage inside the EU, and states in three separate documents that user images never train a model. For agencies and photo desks that have to justify where a client's files went, that is a real differentiator. The limits are just as clear and worth weighing first. There is no API, no application, no batch mode and no support for RAW, TIFF or PSD, so this is a tool you sit in front of rather than one you plug into a pipeline. Refunds are generally excluded, a credit is consumed even when none of the four variants convinces, and closing an account requires an email to support. No data processing agreement is offered, which will rule it out for some regulated buyers. The company is young, a Viennese GmbH for which UpSynth is the first product, with no publicly announced funding, and the documentation concedes that advanced guides are still planned. If you value control over speed and work image by image, UpSynth deserves a serious look; if you need volume, automation or contractual guarantees, it is not there yet.
- Choosing a selection results in a full page refresh.
- Opens in a new window.