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jstash

JSON storage for each signed-in user of a web app

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Let signed-in users save and load their own private JSON data across devices using existing login providers, with no backend required.

Overview

Screenshot of the jstash homepage

The jstash homepage

jstash is JSON storage for web app users. Each signed-in user gets their own private JSON document that they can save and load across any device using the app's existing login from Clerk, Supabase, Firebase or Google.

The service requires no backend setup, database design or security rules. Developers connect their login provider, create an app in the jstash dashboard, and use a few lines of fetch code to save and load user data. A token only ever reaches that person's documents.

jstash is designed for small data needs: user preferences, drafts, notes, progress checkpoints and personal settings that should follow someone between devices. It deliberately does not offer live sync, shared data, queries or an uptime SLA.

Capabilities

  • Per-user private JSON documents
  • Cross-device data sync on sign-in
  • Built-in access control
  • JSON Bins for public storage at a URL
  • No backend or database setup required
  • Document size limits: 100 KB free, 1 MB Pro
  • Encrypted daily backups for recovery

Pricing

Pricing model: Freemium

Free: 1 app with up to 100 users, 5,000 writes and 50,000 reads a month, 100 KB per document, 10 MB storage. Pro: US$5 a month, billed monthly, 3 apps with up to 1,000 users, 40,000 writes and 400,000 reads a month, 1 MB per document, 1 GB storage.

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jstash fact sheet

Community votes0
Based inAustralia
Websitejstash.app

jstash metrics

Vendor metrics for jstash.app: Ahrefs Domain Rating and Majestic link data, with the delta since the last review.

Domain Rating
0
no change since last check
Trust Flow
1
no change since last check
Citation Flow
17
no change since last check
Referring domains
4
no change since last check
External backlinks
6
no change since last check

Vendor Domain Rating (Ahrefs) checked 6 Nov 2026, spec changed 25 Oct 2026. Vendor topic: Society/People (1). Vendor Majestic data checked 25 Oct 2026, spec changed 25 Oct 2026. Link metrics supplied by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

jstash vendor domain

Open the vendor record

We read this from the registry's RDAP record on 5 Nov 2026, 22:04 UTC.

Domain age
1 month
Registered
Expires
Registrar
CloudFlare, Inc.
DNSSEC
Not signed

Vendor domain report: jstash.app

jstash post-launch report

Measured after jstash went live on SaaS Directory Pro on 25 October 2026.
MeasureAt launch, then latest
Domain Rating (Ahrefs)0 to 0 no change since launch
25 Oct 2026, then 6 Nov 2026
Trust Flow (Majestic)1
first measured 25 Oct 2026
Referring domains (Majestic)4
first measured 25 Oct 2026

Day 11 since launch. Next receipt: day 30, 24 Nov 2026. Many things move these figures, so a change is not proof of cause. Only stored readings are shown.

Biggest gains on SaaS Directory Pro

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Compare and explore

See the alternatives to jstash, Volt Active Data vs jstash, jstash vs yggy, OneNode vs jstash, jstash vs Tilores, jstash vs GenesisDB, jstash vs Traverse, more in Databases & backend or startups in Australia.

Buyer questions

What does jstash do?

jstash lets each signed-in user of a web app save and load their own private JSON data. Users can save their settings, notes, drafts and progress on one device and access them on any device where they sign in.

Do I need a card to start using jstash?

No. The Free plan and trial JSON bins never ask for payment details.

What login providers does jstash work with?

jstash works with Clerk, Supabase Auth, Firebase Auth and Google Sign-In. Clerk and Google are tested end to end; Supabase Auth and Firebase Auth work with simulated tokens.

What happens if I reach my monthly limits?

Reaching monthly write or read allowances blocks further corresponding requests with HTTP 429 and MONTHLY_QUOTA_EXCEEDED, including the reset time. Nothing is deleted and your data stays readable in the dashboard. Allowances reset on the 1st at 00:00 UTC.

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jstash has a free listing. The owner can unlock the full profile with a paid launch for $5:

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  • Demo video (locked)
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