Tools Directory
Search and filter the complete collection of 37 technical utilities for networking, development, security, operations and files.
37 Tools across the workbenchColor Contrast Checker
Check WCAG text contrast for two hex colors.
Linux Permission Calculator
Convert octal chmod modes and inspect special bits.
Unicode and Text Inspector
Count UTF-8 bytes, graphemes and invisible whitespace.
Line Sort and Deduplication
Remove duplicates, trim, sort and clean up line lists.
JSON Lines Validator
Locate invalid JSONL records and inspect record types.
IPv4 Subnet Calculator
Calculate network, broadcast, usable range, and host count for an IPv4 CIDR prefix.
JSON Formatter & Validator
Validate, pretty-print, or minify JSON without uploading your data.
JoeC URL Shortener
Create expiring short links using the joec.pw domain with anti-abuse protection.
URL Encoder & Decoder
Encode and decode URL components instantly in your browser.
Base64 Encoder & Decoder
Convert UTF-8 text to and from Base64 locally. Not encryption.
Unix Timestamp Converter
Convert Unix seconds or milliseconds into local and UTC dates.
Password Generator
Generate randomized passwords locally using your browser’s cryptographic API.
UUID v4 Generator
Create secure random UUID identifiers locally without APIs.
File & Text SHA Hash
Calculate SHA-256/384/512 digests for a file or text.
Image & File Converter
PNG to PDF or JPG locally; optional DOCX to PDF and MP4 to MP3.
CSV / JSON Converter
Convert tables with quoted fields and safe spreadsheet output.
Line-by-Line Text Diff
Find added and removed lines in configuration snippets.
Local Log Analyzer
Filter diagnostics and count errors, warnings and information.
HTTP Response Header Review
Evaluate pasted response headers without scanning a live URL.
CIDR Split & Aggregate
Split IPv4 prefixes or combine adjacent networks.
SPF / DMARC Analyzer
Review pasted email authentication records.
SLA & Error Budget
Calculate allowable downtime for an availability target.
Incident Timeline Builder
Format time-ordered incident events and elapsed time.
cURL Request Builder
Generate shell-quoted HTTP requests without execution.
JWT Claims Inspector
Decode unverified token claims locally.
JSON Pointer Tester
Inspect JSON values using RFC 6901 paths.
API Response Comparator
Compare JSON objects and report changed fields.
HTTP Problem Details Builder
Generate standard HTTP error response objects.
Network Port Reference
Common service mappings for known port numbers.
HAR File Summary
Summarize browser network capture timings and statuses.
Cron Schedule Preview
Calculate upcoming UTC times from five-field expressions.
IPv6 Prefix Calculator
Expand IPv6 network ranges and prefix address counts.
DNS Record & Zone Review
Validate pasted record lines, without live DNS.
Change Risk Matrix
Score change risk from impact, likelihood and recoverability.
Timezone & DST Planner
Compare an instant in several IANA timezones.
OpenAPI JSON Explorer
Inspect operations from pasted OpenAPI 3.x specifications.
Incident Report Generator
Draft a structured Markdown incident report.
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Need terminal examples? Browse 13 copy-ready diagnostic scripts ↗
More tools, added carefully.
Active DNS or certificate inspection would require additional network-security safeguards. Existing tools cover pasted DNS records, cron schedules, and CIDR allocation.
Technical Field Guide
Step-by-step explanations for DNS, incident response, Apache, PostgreSQL, Prometheus and safe deployments. Use the companion tools and scripts when a reference alone is not enough.
Read the 12 guides ↗PromQL, LogQL, SQL, KQL and Splunk queries
Copy-only query examples with documented assumptions. No remote execution or credentials required.
Browse Query Library