See, understand and fix your data in Couchbase.

CouchEpsilon is a desktop IDE and GUI client for Couchbase Capella and Couchbase Server, on macOS, Windows and Linux. For people who have the cluster credentials but not the console: search a value across every bucket, see why a SQL++ query is slow and work in production without fear.

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FreemacOS, Windows and Linux

Pick a topic to see it in the IDE.

CouchEpsilon — payments-prod

Transaction TracerQuery DoctorField profile

Search for a valuepay_8f3a21

Type a value and search every bucket at once.

payments.transactions.charges1
charge::2026-09-27::pay_8f3a21in payment_idpending_confirmation
notifications._default.webhooks2
webhook::evt_51c0e9in payload.payment_idretry 3/5
webhook::evt_51b7a2in payload.payment_idfailed
audit.events.payments1
event::2026-09-27T14:07:45::pay_8f3a21in reftimeout
users._default.profiles0
0 results because an index is missingNo index covers recent_payments. Suggested: CREATE INDEX ON users(DISTINCT recent_payments)

Open a match to see its document.

charge::2026-09-27::pay_8f3a21

{  "type": "charge",  "payment_id": "pay_8f3a21",  "amount": 149.90,  "currency": "USD",  "status": "pending_confirmation",  "provider": "gateway_a",  "attempts": 3,  "confirmed": false,  "created": "2026-09-27T14:02:11Z",  "customer": {    "id": "cli_20931",    "country": "GT"  }}

SELECT c.payment_id, c.status, c.amountFROM payments.transactions.charges AS cWHERE c.customer.id = $customer  AND c.status = "pending_confirmation"

Scans the whole collectionPrimaryScan3 · 1,284,392 documents, no useful index
Fetches every full documentFetch · the most expensive part of this query
Discards the ones that don't matchFilter · 7 left
Returns 3 fieldsInitialProject

Time 4.82 sRead 1,284,392Results 7

ADVISE recommends

CREATE INDEX adv_customer_status
ON payments.transactions.charges(
customer.id, status)

With this index it would read ~7 documents

Save the change to 1 document?

charge::2026-09-27::pay_8f3a21

-  "status": "pending_confirmation",+  "status": "confirmed",-  "confirmed": false,+  "confirmed": true,

CancelSave to prod

You have the key to the data, but not the window.

At companies that use Capella, the console belongs to a few admins. Teams get database credentials and nothing else. When there was an incident, three paths were left:

Write an SDK script for every question.
Ask someone with console access to look for you.
Investigate from a side tree inside a code editor.

CouchEpsilon is the window. With the same credentials you open the cluster and see the data.

Write and understand queries

SQL++ editorHighlighting, formatting, tabs, history and autocomplete with your cluster's real keyspaces.
Named parametersReusable queries with $customer or $payment_id, without concatenating values by hand.
Field profileWith INFER you see which fields exist, with which types and in what percentage. Half-finished migrations stand out.

Compare documents and work on any cluster

Document diffCompare two documents side by side, or an edit against the original before saving.
Capella and ServerProfiles for Couchbase Capella and self-managed Couchbase Server, with SSH tunnel or corporate proxy.

Guardrails for working in production

Human error in production is prevented by design, not willpower. The guardrails come turned on.

The environment always in sightEvery profile is tagged dev, qa or prod, and the tag never leaves the screen.
Read-only lockBlocks writes per profile. To investigate in prod you don't need to be able to modify.
Confirmation with diffNo destructive action without confirmation, and you always see what changes before saving.

No basic safety feature is ever charged for.Keychain, read-only, environments and confirmations are in every edition.

Your data never leaves your machine.

CouchEpsilon talks directly to your cluster: there's no server of ours in between. It only uses the internet for your account and your license.

Credentials in the system keychain
No servers of our own

Freeforever, commercial use included

SQL++ editor with named parameters, keyspace autocomplete and query cancellation
Document browser with filters, editing with a diff before saving and CSV / JSON export
Schema: sample document, detected fields and value distribution
Connection through SSH tunnel, corporate proxy or TLS
Environments, read-only and OS keychain

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Launch price

US$ 5.99per monthOr US$ 59.99 a year and save 16 %

Everything in Community, plus:
Transaction Tracer and index diagnostics
Query Doctor: readable plan, ADVISE, plan comparison, slow queries and index usage
Field profiling, model generation and test data
Document diff, collection comparison and bulk import
Full Text Search and vector search
Field autocomplete and live validation

Buy Pro

If a free feature becomes paid, we give you 30 days’ notice and it only changes in new versions.Compare editions in detail

Coming soon

Available on November 11, 2026 at 11:00 AM (Guatemala time, GMT-6)

CouchEpsilon can't be downloaded yet. On launch day we will publish the installers for macOS, Windows and Linux right here.

Create your account before launch and we will email you a 10% discount code for your first purchase.

Create account

The next incident, with the window open.

Create account

See editions

See, understand and fix your data in Couchbase.

You have the key to the data, but not the window.

Search every bucket and debug slow queries

Write and understand queries

Compare documents and work on any cluster

Guardrails for working in production

Your data never leaves your machine.

Truly free. Pro when you live in Couchbase.

Community

Pro

Download CouchEpsilon

The next incident, with the window open.

See, understand and fix your data in Couchbase.

CouchEpsilon in action

You have the key to the data, but not the window.

Search every bucket and debug slow queries

Write and understand queries

Compare documents and work on any cluster

Guardrails for working in production

Your data never leaves your machine.

Truly free. Pro when you live in Couchbase.

Community

Pro

Download CouchEpsilon

The next incident, with the window open.