errsole.js
Errsole is a Node.js logging module that collects, stores, and visualizes application logs in a single package. It includes a built-in web dashboard for viewing, filtering, and searching logs, plus support for multiple storage backends (SQLite, MySQL, PostgreSQL, MongoDB) and critical error notifications.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | errsole/errsole.js |
| Owner | errsole |
| Primary language | JavaScript |
| License | MIT — OSI-approved |
| Stars | 656 |
| Forks | 58 |
| Open issues | 5 |
| Latest release | v2.18.2 (2025-07-30) |
| Last updated | 2025-10-07 |
| Source | https://github.com/errsole/errsole.js |
What errsole.js is
Errsole is a JavaScript/Node.js logger that intercepts console output, provides structured logging with metadata support, and persists logs to pluggable storage backends. It includes a web-based log viewer dashboard with authentication, search, and filtering capabilities.
Get the errsole.js source
Clone the repository and explore it locally.
git clone https://github.com/errsole/errsole.js.gitcd errsole.js# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Choose storage backend early: SQLite for dev, MySQL/PostgreSQL/MongoDB for production. Migration between backends not clearly documented.
- Dashboard runs on default port 8001; network isolation and reverse proxy configuration needed for production (EADDRINUSE error noted in FAQ).
- Automatic console interception means all console.log/error calls are captured; verify this does not conflict with existing logging middleware or cause duplicate logs.
- Metadata attachment requires using Errsole's advanced logging API; standard console calls may lack context needed for effective filtering.
- Log retention policies must be configured; default rotation behavior not stated in excerpt. Database disk space planning required.
When to avoid it — and what to weigh
- Large-scale multi-tenant SaaS with strict data isolation requirements — No mention of audit logging, row-level security, or compliance features (SOC 2, HIPAA, GDPR data handling). Requires review before use in regulated environments.
- Existing heavy investment in ELK, Datadog, or CloudWatch — Switching to Errsole as the primary logger requires migration effort and abandonment of established alert rules, dashboards, and log pipelines.
- Microservices architecture requiring centralized, distributed trace correlation — No mention of trace ID propagation, context propagation, or integration with APM platforms. Centralized storage without tracing context limits troubleshooting across services.
- Applications requiring long-term log retention (years of data) — Log rotation is configurable, but no details on cost-effective archival, compression, or querying old data. Database-backed storage may become expensive at scale.
License & commercial use
Licensed under MIT, a permissive OSI license allowing commercial use, modification, and distribution with attribution and no warranty.
MIT license permits commercial use. However, no explicit commercial support, SLA, or liability clarification provided. Enterprise features (team management, authentication) are built-in but no paid support tier or hosting service mentioned. Requires review of support model before production dependency.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Good |
| Assessment confidence | High |
Dashboard includes authentication and team management features (mentioned), but security details absent from excerpt: no info on password policy, session handling, encryption in transit/at rest, or vulnerability disclosure process. Requires review of security docs and latest CVE scan before production use. Automatic console interception may capture sensitive data (tokens, PII); no sanitization mentioned.
Alternatives to consider
Winston (with plugins)
Mature, widely adopted logger with broader transport ecosystem; less integrated UI but more flexible for multi-destination logging and complex log processing pipelines.
Pino
Lightweight, high-performance JSON logger focused on low overhead; integrates with external log aggregation (ELK, Datadog) better than Errsole for distributed tracing.
Elastic Stack (ELK) or Datadog
Enterprise-grade centralized logging with advanced analytics, APM, and compliance features; higher operational cost but mature security and multi-tenant isolation.
Build on errsole.js with DEV.co software developers
Evaluate Errsole for your team's logging needs. Compare storage options, review security posture, and test dashboard features on a staging environment before production rollout.
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errsole.js FAQ
Can Errsole run the dashboard on a separate server from my app?
What happens to logs when the app crashes?
Is log data encrypted?
How do I migrate logs between storage backends?
Software development & web development with DEV.co
Adopting errsole.js is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate open-source observability software in production.
Ready to simplify Node.js logging?
Evaluate Errsole for your team's logging needs. Compare storage options, review security posture, and test dashboard features on a staging environment before production rollout.