Show HN: Jsonl Viewer Pro – Open 5GB Security Logs Instantly on Mac

See It In Action

JSONL Viewer Pro makes analyzing massive log files effortless. Open 5GB files instantly, filter on nested fields, and export results—all with native Mac performance.

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See how fast you can analyze security logs with advanced filtering, nested object flattening, and real-time search.

Filter alerts by severity, hunt for suspicious IPs, and export filtered results. Handle daily 5GB+ log files without breaking a sweat.

AWS CloudTrail, Azure logs, GCP audit logs. Nested JSON fields automatically flattened for easy filtering and sorting.

Endpoint detection logs with deeply nested objects. Use numeric operators like alert.severity <= 2 for high-priority threats.

Blazing Fast Performance

Multi-threaded parsing with simdjson. Built with C++ for native speed, not Electron bloatware. Opens 5GB files in seconds.

Nested Object Flattening

Automatically expands nested objects into columns: alert.signature, flow.bytes_toserver, user.profile.email. Filter on any nested field.

Advanced Filtering

Text search across all columns. Numeric operators: >100, <=50, !=0. Perfect for filtering by severity, byte counts, or timestamps.

Multiple File Formats

Supports .jsonl and .jsonl.gz (gzip compressed). Export filtered results. Quick stats showing min/max/avg values.

Column Management

Freeze important columns, hide/show any field, auto-sizing. Perfect for working with wide security log schemas.

Privacy First

Native Mac app. No internet required. Your data never leaves your machine. Small 6MB footprint. Zero telemetry.

3-5hours

vs command-line tools

$2,000+

vs Elasticsearch cluster

"I analyze IoT device logs with deeply nested sensor data. JSONL Viewer made it trivial to filter on device.temperature.celsius > 80 across millions of records. Saved me hours every week."

Ken Lundberg

DevOps Engineer

"Finally, a tool that can handle our daily Suricata logs without choking. The nested field flattening is a game-changer for hunting through alert metadata. Worth every penny."

Karthik Shankar

SOC Analyst

"I'm predominantly using JSONL right now for analyzing flow data from Suricata in my role at OPSWAT."

Pedram Amini

Chief Scientist

Individual

$49

Perfect for solo analysts

• ✓ All features included
• ✓ Lifetime updates
• ✓ Email support
• ✓ Mac Silicon native

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BEST VALUE

Team (5 seats)

$229

For SOC teams

• ✓ Everything in Individual
• ✓ 5 license keys
• ✓ Priority support
• ✓ Team training session

Contact Sales

Enterprise

Custom

For large organizations

• ✓ Unlimited seats
• ✓ Dedicated support
• ✓ Custom features
• ✓ SLA guarantee

Contact Sales