Tools
One page, one job. Every tool below runs locally in your browser — deterministic first, AI only when it genuinely helps.
What can you do with these browser tools?
Short answer: LessInAI provides local-first utilities for technical work: format, convert, validate, inspect, calculate, and generate data. Your input stays in the browser by default, and results come from explicit rules and parsers.
Available tools
Showing 24 of 24 tools
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back.
JSON Formatter & Validator
Format, validate, and inspect JSON with clear error positions.
Base64 Encoder / Decoder
Encode and decode Base64 and Base64URL locally in your browser.
URL Encoder / Decoder
Encode and decode URL components and query strings safely.
UUID Generator
Generate random UUIDs (v4) in bulk, ready to copy.
Hash Generator
Compute SHA-1, SHA-256, and SHA-512 hashes of text input.
JWT Decoder
Decode JWT headers and payloads locally — no signature verification.
Regex Tester
Test regular expressions against sample text with live matches.
Cron Expression Parser
Parse cron expressions into plain language and upcoming run times.
chmod Calculator
Convert between octal and symbolic Unix file permissions.
CIDR / Subnet Calculator
Calculate network range, broadcast, and host counts from CIDR notation.
Text Diff Checker
Compare two texts and highlight every added and removed line.
YAML ↔ JSON Converter
Convert YAML to JSON and JSON to YAML without losing structure.
JSON ↔ CSV Converter
Turn JSON arrays into CSV rows and CSV data back into JSON.
XML Formatter
Pretty-print and validate XML documents with indentation.
HTML Entity Encoder / Decoder
Encode and decode HTML entities for safe markup display.
QR Code Generator
Generate QR codes for text or URLs, rendered locally.
Password Generator
Generate strong random passwords with adjustable rules.
Timezone Converter
Convert times between IANA timezones with DST handled.
Date Difference Calculator
Calculate the exact duration between two dates and times.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Byte / KB / MB / GB Converter
Convert between bytes, KB, MB, GB, and TB — both SI and IEC.
User-Agent Parser
Parse a User-Agent string into browser, OS, and device details.
IP Range Calculator
Expand IP ranges into start, end, count, and CIDR blocks.
Which standards guide these tools?
Parsing and formatting behavior follows established standards and browser implementations where practical. Use these sources to verify the facts behind URL, JSON, and Base64 operations.