Log tools

ANSI Color Code Stripper

Strip ANSI escape and color codes from terminal logs to get clean plain text. Re

Apache Access Log Parser

Parse Apache Common Log Format (CLF) and the Combined Log Format directly in you

Apache Log to JSON Converter

Convert Apache access logs (CLF and Combined format) and error_log lines into cl

Apache/Nginx Error Log Analyzer

Analyze Apache and Nginx error logs: auto-detect format, extract severity and me

Audit Log Formatter

Turn delimiter-separated audit lines into clean, column-aligned tables with name

AWS CloudTrail Log Parser

Parse AWS CloudTrail event JSON: flatten event time, service, action, identity a

AWS CloudWatch Log Formatter

Format AWS CloudWatch Logs output: auto-detect S3 export envelopes, logEvents ob

Azure Application Insights Formatter

Format Azure Application Insights traces: auto-detect structured JSON lines, on-

Bandwidth Usage Calculator

Compute bandwidth usage from access logs: total bytes served, average per reques

Broken Link Checker

Audit a pasted CSV link inventory (source,target): internal vs external, insecur

Brute-Force Detector

Detect brute-force logins in logs: count failures per IP within a time window us

CLF (Common Log Format) to JSON Converter

Convert Common Log Format (CLF) access logs — remote host, identity, user, times

Combined Log Format Converter

Parse Combined Log Format access logs — remote host, identity, user, timestamp,

Control Character Remover

Remove control characters (NUL, tab, CR, form feed, backspace, DEL, C1) from log

CSRF Methods Guide & Assessment

Compare eight anti-CSRF methods — synchronizer token, double-submit cookie, Same

CSV to Log Converter

Convert CSV log exports back into readable log lines: parse comma, semicolon or

Custom Header Guide & Detector

Searchable reference of custom HTTP headers (X-Request-ID, X-Forwarded-For, X-Ra

Date/Time Range Filter

Filter log lines to a start/end datetime window. Supports ISO 8601, Apache/nginx

Docker Container Log Formatter

Format Docker container logs: auto-detect JSON driver, prefixed (stdout:), and p

Duplicate Log Line Remover

Remove duplicate log lines, keeping the first occurrence. Optional ignore-timest

Encoding Issue Detector

Scan a log for encoding issues: U+FFFD replacement characters, mojibake from dou

Error Rate Calculator

Calculate error rate from logs: bucket errors by minute/5-min/hour/day, see the

Error / Retry Analyzer

Group access log failures into retry sequences by client IP or request ID, count

Error Trend Chart Generator

Generate an error trend chart from any log: detect error-level lines and HTTP 4x

Exclude Pattern Filter

Strip noisy log lines (healthchecks, heartbeats, probes) by substring or regex p

Firewall Log Analyzer

Analyze firewall logs: parse UFW [UFW BLOCK] and iptables DROP/ACCEPT kernel lin

HTTP Error Spike Detector

Detect HTTP 5xx error spikes in access logs: bucket requests by time, apply abso

HTTP Status Code Analyzer

Analyze HTTP status codes from access logs: per-code counts, 2xx/3xx/4xx/5xx cla

IIS Log Converter

Parse Microsoft IIS / W3C extended log files — header-driven, space-delimited fi

IP Address Filter / Extractor

Extract unique IP addresses from logs with counts, or filter log lines to keep/r

Journalctl Log Formatter

Format journalctl output: parse short and ISO timestamp layouts, fold multi-line

JSON Log Parser

Parse JSON Lines (JSONL / NDJSON) logs in your browser — one JSON object per lin

JSON to Log Converter

Convert JSON log objects back into readable log lines: JSON array or JSONL in, p

JSON Lines (JSONL) to Log Converter

Convert JSON Lines (one JSON object per line) back into readable log text. Choos

Kubernetes Pod Log Formatter

Format Kubernetes pod logs: parse zap-style structured JSON (level, ts, caller,

Key-Value Log Parser

Parse key=value style log lines in your browser — the request logs, firewall log

Line Ending Checker

Detect and count line endings in a log file: CRLF, LF, and legacy CR. See which

Log Beautifier

Beautify log text: align pipe-delimited columns into tables, word-wrap long line

Log Comparison Report Generator

Compare two log windows (before/after): count added, removed and common lines, d

Log Digest Generator

Turn raw logs into a daily or weekly digest: aggregated counts by category and l

Log Encoding Converter

Decode, repair and transcode log text between UTF-8, ANSI/Windows-1252, ISO-8859

Log File Chunker

Split a log file into byte-accurate chunks that fit upload, queue, or API size l

Log File Diff

Compare two log files with a unified line diff: see removed and added lines with

Log File Merger

Merge multiple log files into one timeline sorted by timestamp. Extract timestam

Log File Splitter

Split large log files into smaller chunks by line count, target file size (witho

Log Format Validator

Validate every line of a log against an expected format: standard timestamp-leve

Log Frequency Analyzer

Count log events per minute, hour or day with peak bucket, average rate and per-

Log Grep

Grep your pasted logs in the browser — plain text or regular expression search w

Log Growth Tracker

Track log file growth from size samples: growth rate per hour/day, growing/shrin

Log Integrity Checker

Verify a log timeline: find out-of-order timestamps, lines missing timestamps, d

Log Level Filter

Filter log lines by severity level (ERROR, WARN, INFO, DEBUG, TRACE, FATAL). Kee

Log Line Counter

Count log lines by severity level, by day, by client IP, or against a custom reg

Log Line Numbering Tool

Add sequential line numbers to your log text, or strip existing ones. Choose the

PII Scrubber

Scrub personal data from your logs: remove or mask emails, phone numbers, social

Log Regex Parser

Turn any log format into a structured table using a regular expression with name

Log Rotation Splitter

Split a large log into a simulated logrotate file set: newest chunk keeps the ba

Sensitive Data Masker

Redact sensitive data in your logs before sharing them: mask IPv4/IPv6 addresses

Log Summary Analyzer

Get headline log statistics in one click: total and unique lines, error/warning

Log Summary Report Generator

Generate a log summary report from any paste: auto-detect line counts, time span

Time-Based Log Segmenter

Split a log file into time-based segments: by hour, calendar day, or ISO week. E

Log Timeline Visualizer

Visualize log event volume over time: auto-detect ISO, epoch and syslog timestam

Log Timestamp Format Converter

Convert log timestamps between Unix epoch seconds, milliseconds and ISO 8601, or

Log to CSV Converter

Convert raw log lines into CSV with proper quoting: auto-detect timestamp, level

Log to HTML Table Converter

Turn structured logs — JSON Lines, CSV, key=value or tab-separated — into clean,

Log to JSON Converter

Convert raw log lines into structured JSON objects: auto-detect timestamps, leve

Log to Markdown Table Converter

Turn structured logs — JSON Lines, CSV, key=value lines or tab-separated text —

Log to Excel (XLSX) Converter

Convert log lines into an Excel file you can open and filter: auto-detect timest

Log to XML Converter

Convert log lines into well-formed XML: auto-detect timestamp, level, category a

Log Truncator

Truncate long log lines to a maximum character length in your browser. Limit lin

Mail Server Log Parser

Parse mail server logs: decode Postfix maillog and Sendmail stat= lines, extract

Malformed Line Detector

Detect malformed log lines: pattern mismatches, stray control characters, tabs a

Missing Field Detector

Check every log record against a declared field list in key=value or JSON mode,

Multi-File Log Search

Search multiple log files in a single paste, grouped per file with match counts.

Multi-Line Log Parser

Reassemble multi-line log entries in your browser — stack traces, exception dump

MySQL Slow Query Log Analyzer

Analyze MySQL slow query logs: extract Query_time, Lock_time, Rows_sent and Rows

Nginx Access Log Parser

Parse Nginx access.log files in your browser with support for the combined log_f

Nginx Log to JSON Converter

Convert Nginx access logs (combined format, ISO or Apache-style timestamps, X-Fo

PostgreSQL Log Parser

Parse PostgreSQL logs: extract timestamp, PID, user, database, severity and mess

Rate Limit Violation Detector

Find IPs exceeding your request-rate policy in access logs: count requests per I

Referrer Analyzer

Extract and classify referrers from access logs: direct, search, social, interna

Response Time Analyzer

Analyze response times from access logs: min, average, p95, p99, max, plus a con

Session Duration Calculator

Pair login and logout events from auth or VPN logs into per-user sessions with a

SQL Injection Detector

Detect SQL injection attempts in web and application logs: union-based, boolean-

Suspicious IP Checker

Match every IP in your logs against a pasted blocklist or threat feed, with CIDR

Syslog Parser

Decode syslog messages in your browser — RFC 5424 (the <34>1 2026-08-16T... head

Syslog to JSON Converter

Convert syslog messages (RFC 3164 and RFC 5424) into clean JSON records. Parses

Top IP Addresses Extractor

Extract and rank IP addresses from access logs by occurrence count, with percent

Top Requested URLs Extractor

Extract and rank requested URL paths from access logs by hit count, with percent

Traffic Pattern Analyzer

Chart request volume over time as an ASCII bar graph, with per-minute to per-day

Unique Log Line Extractor

Extract distinct log lines (with counts) or distinct tokens like IPs, URLs and s

User Agent Parser / Analyzer

Parse user agents from access logs: browser, OS and device classification with c

Windows Event Log (EVTX) to CSV Converter

Convert Windows Event Log XML exports (wevtutil / Event Viewer “Save All Events”