JSON Diff Viewer
Compare two JSON objects and highlight differences.
Enhanced Category
Developer & Network Tools
Developer and network tools for formatting data, checking infrastructure facts, decoding payloads, testing syntax, and troubleshooting web or IP workflows.
Start with these tools
Use this collection when a development or network task needs a focused browser utility: DNS and IP checks, SQL or JSON formatting, token inspection, encoders, hashes, headers, ports, latency, or subnet planning.
Subnet Calculator
Calculate network, broadcast, host range, and mask details from CIDR.
AI Prompt Optimizer
Analyze and improve AI prompts for clarity and effectiveness.
API Response Formatter
Beautify and syntax highlight JSON/XML responses.
Barcode Generator
Generate CODE39 and EAN-13 barcodes as SVG output.
Base64 Encoder Decoder
Encode and decode Base64 text directly in browser.
Common workflow
- Identify whether the task is formatting, decoding, validating, generating, or troubleshooting.
- Paste the smallest safe input that reproduces the issue or calculation.
- Review the output in the target runtime, resolver, protocol, or configuration context before changing production systems.
Related collections
Full Developer & Network tool list
JSON Diff Viewer
Compare two JSON objects and highlight differences.
Subnet Calculator
Calculate network, broadcast, host range, and mask details from CIDR.
AI Prompt Optimizer
Analyze and improve AI prompts for clarity and effectiveness.
API Response Formatter
Beautify and syntax highlight JSON/XML responses.
Barcode Generator
Generate CODE39 and EAN-13 barcodes as SVG output.
Base64 Encoder Decoder
Encode and decode Base64 text directly in browser.
CIDR Aggregator
Compute a covering supernet for multiple CIDR blocks.
Cron Builder
Build cron expressions and ready-to-paste crontab lines from schedule fields.
CSS Minifier/Beautifier
Minify or beautify CSS code.
DNS Lookup
Query DNS records by type for a host.
DNS Propagation Checker
Check DNS record propagation across major public resolvers.
DNS Record Builder
Generate valid DNS zone record lines for common record types.
EBCDIC Converter
Convert text to EBCDIC hex and vice-versa.
Environment Variable Manager
Convert between .env formats and validate variables.
Git Diff Stat Calculator
Calculate lines added/removed from git diff output.
Hash Generator
Generate MD5, SHA1, and SHA256 hashes from input text.
HTTP Headers Checker
Fetch response headers for a URL using HEAD requests.
IP Classifier
Classify IPv4/IPv6 addresses by private, loopback, multicast, and more.
IP Lookup
Inspect IP type and reverse DNS details.
IPv4 to Integer Converter
Convert IPv4 addresses to 32-bit integers and back.
IPv6 Compressor Expander
Compress or fully expand IPv6 notation.
JWT Decoder
Decode JWT header and payload claims for debugging.
Latency Budget Calculator
Allocate and track end-to-end latency budget across system components.
Markdown Preview
Live markdown editor with real-time preview.
MTU MSS Calculator
Calculate effective payload and TCP MSS from MTU and tunnel overhead.
Packet Loss Impact Estimator
Estimate throughput degradation from loss and RTT assumptions.
Password Generator
Generate secure random passwords with customizable rules.
Password Strength Checker
Evaluate password strength with score, entropy estimate, and improvement tips.
Port Range Planner
Plan port ranges against concurrent session requirements.
Random String Generator
Generate random strings with configurable length and character sets.
Regex Tester
Test regular expressions with flags, matches, and capture groups.
SHA256 Generator
Generate SHA256 hashes from plain text input.
SQL Formatter
Beautify and format SQL queries.
SQL Prettifier
Format SQL queries into readable or compact output.
SSL Certificate Validator
Check SSL/TLS certificate validity and details.
Supernet Calculator
Find the smallest covering CIDR for an IPv4 start/end range.
Throughput Unit Converter
Convert bps/Kbps/Mbps/Gbps and estimate transfer time.
Unix Timestamp Converter
Convert unix timestamps to UTC datetime and back.
Uptime SLA Calculator
Translate SLA percentage targets into allowed downtime windows.
URL Encoder Decoder
Encode and decode URL strings for safe query and path handling.
User Agent Parser
Parse browser, OS, and device from user-agent strings.
VLSM Planner
Plan variable-length subnet allocations from a base CIDR.
What's My IP
Show the client IP address seen by the server.
WHOIS Lookup
Fetch WHOIS registration data for domains.
Wildcard Mask Calculator
Convert subnet masks into wildcard masks for ACL rules.
XML Formatter
Pretty-print, compact, and validate XML quickly.
FAQ
What are Developer & Network tools useful for?
They handle focused developer & network tasks where a single-purpose page is faster than a spreadsheet or full application.
How many tools are in this collection?
This category currently includes 46 focused tools, with the most practical starting points shown first.