LumaTool Free Online Tools
Developer utilities, network checks, text processing, and video tools in one place.
All Online Tools
Choose a tool to get started. LumaTool supports developer utilities, network checks, text processing, and video tools.
Developer Tools
JSON Formatter
Format, minify, validate, sort keys, escape, and unescape JSON locally.
Use Now BBase64 Encode / Decode
Encode and decode Base64 text with UTF-8, URL-safe, and Unicode support.
Use Now UURL Encode / Decode
Encode, decode, parse, and build URL query parameters in batches.
Use Now UUnix Timestamp Converter
Convert seconds, milliseconds, local time, UTC time, and ISO date strings.
Use Now UUUID Generator
Generate one or many UUID v4 values locally with browser crypto fallback.
Use Now JJWT Decoder
Decode JWT header and payload locally without sending tokens to a server.
Use Now RRegex Tester
Test JavaScript regular expressions and inspect matches, indexes, and groups.
Use Now CCSV to JSON
Convert CSV rows to JSON arrays or objects locally.
Use Now JJSON to CSV
Convert JSON objects or arrays to CSV for spreadsheets and reports.
Use Now HHTML Escape / Unescape
Escape and unescape HTML entities for safe display and debugging.
Use NowNetwork Tools
IP Address Lookup
Check public IP, location, ISP, ASN, browser, and network details.
Use Now UUser Agent Parser
Parse browser, operating system, device, rendering engine, and crawler signals.
Use Now DDNS Lookup
Look up DNS records such as A, AAAA, CNAME, MX, TXT, and NS.
Use Now PPing Test
Check HTTP reachability and latency without running shell ping commands.
Use Now HHTTP Headers Checker
Inspect response headers, cache policy, redirects, and security headers.
Use NowText Tools
Word Counter
Count characters, words, lines, paragraphs, reading time, and CJK characters.
Use Now CCase Converter
Convert text to uppercase, lowercase, title case, camelCase, PascalCase, kebab-case, and snake_case.
Use Now TText Diff
Compare two text blocks and highlight added, removed, and unchanged lines.
Use Now LLorem Ipsum Generator
Generate placeholder paragraphs, sentences, and words for mockups.
Use Now DDuplicate Line Remover
Remove duplicate lines from text instantly. Supports keeping original order, removing empty lines, case-insensitive matching, and trimming whitespace.
Use Now MMarkdown Preview Tool
Write and preview Markdown online. Supports headings, lists, tables, code blocks, blockquotes, links, and common Markdown syntax.
Use NowVideo & Subtitle Tools
YouTube Video ID Extractor
Extract video IDs from watch, youtu.be, shorts, embed, and live YouTube URLs.
Use Now SSRT to VTT Converter
Convert SRT subtitle files to WebVTT locally in your browser.
Use Now VVTT to SRT Converter
Convert WebVTT captions to SRT subtitle format locally.
Use Now SSubtitle Cleaner
Clean subtitle text, remove tags, normalize whitespace, and keep cue timing.
Use Now SSubtitle Time Shifter
Shift SRT and VTT subtitle timings forward or backward locally.
Use Now SSubtitle Word Counter
Count subtitle blocks, words, characters, duration, reading speed, and longest lines.
Use Now YYouTube Timestamp Generator
Create YouTube links that start at an exact hour, minute, and second.
Use Now TText to Speech Preview
Preview local browser speech voices for short text and subtitle lines.
Use Now YYouTube Transcript Helper
Extract a YouTube video ID and generate watch, embed, thumbnail, and timedtext reference links.
Use Now SSubtitle Translator
Parse SRT/VTT blocks, prepare translation JSON, edit translated text, and export subtitle files.
Use NowSecurity Tools
Password Generator
Generate strong local passwords with length, character set, and ambiguity controls.
Use Now HHash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text.
Use Now RRandom Number Generator
Generate random integers, decimals, and ranges locally with browser crypto.
Use NowImage Tools
QR Code Generator
Generate QR codes for text and links with PNG and SVG downloads.
Use Now IImage Base64 Converter
Convert images to Base64 data URLs and preview Base64 image content locally.
Use Now SSVG Preview
Preview SVG markup safely and inspect dimensions, colors, and risky content.
Use Now IICO Converter
Convert common image formats into favicon-ready ICO files locally.
Use NowDesign Tools
About LumaTool
LumaTool is a free online toolbox for developers, website owners, and everyday users. It provides developer tools, network utilities, text tools, and video-related tools such as JSON Formatter, Base64 Encode/Decode, URL Encode/Decode, Unix Timestamp Converter, UUID Generator, JWT Decoder, DNS Lookup, and HTTP Headers Checker.
Most text and developer tools run locally in your browser and do not require uploading your input to a server. Network tools may send the domain, URL, or IP address you enter to the server only to perform the requested lookup.