JSON Formatter & Validator
Format, minify, and validate JSON with useful error locations.
DeveloperBrowser toolbox
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Private utilities for data, text, encoding, security, and time.
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21 tools available
Showing 21/21 tools · All categories
Base64 Encoder & Decoder
Encode Unicode text or decode standard and URL-safe Base64.
EncodingURL Encoder & Decoder
Encode URL components, decode escaped text, and inspect full URLs.
EncodingUnix Timestamp Converter
Convert Unix seconds or milliseconds to readable dates and back.
Date & timeUUID v4 Generator
Generate one or many cryptographically strong UUID v4 identifiers.
DeveloperSHA Hash Generator
Calculate SHA-256, SHA-384, or SHA-512 for text and local files.
SecurityJWT Decoder
Inspect a JWT header, payload, and time claims without sending the token anywhere.
SecurityText Toolbox
Edit, analyze, and transform plain text in a focused browser workspace.
TextText Diff Checker
Compare text, code, documents, or folders with precise local diffs.
TextRegex Tester, Debugger & Visualizer
Test, explain, visualize, secure, and benchmark regular expressions locally.
DeveloperJavaScript & HTML Playground
Write HTML, CSS, and JavaScript with a sandboxed preview and captured console.
DeveloperMarkdown Editor & Preview
Write, inspect, preview, and export professional Markdown documents locally.
TextPDF Studio & Toolbox
Organize, edit, sign, redact, convert, OCR, and inspect PDFs locally.
DocumentArchive Studio & Toolbox
Create, browse, extract, encrypt, convert, and inspect archives locally.
File & archivePomodoro Focus Studio
Plan tasks, run reliable focus cycles, and understand your local focus history.
ProductivityOnline Timer & Multi-Timer
Run accurate countdowns, multiple timers, stopwatch laps, and interval sequences in your browser.
ProductivityWorld Time Studio & Meeting Planner
Compare world clocks, convert DST-safe times, plan meetings, and share international events locally.
Date & timePublic Holiday & Workday Planner
Explore international holidays, calculate business days, plan leave, and find shared workdays locally.
ProductivityPassword Generator & Security Lab
Create passwords, passphrases, PINs, and random tokens with Web Crypto, then inspect strength locally.
SecurityImage Studio & Batch Optimizer
Edit, resize, convert, inspect, and batch-optimize images without uploading them.
ImageAI Background Remover & Mask Studio
Remove and replace image backgrounds locally with repairable alpha masks and no image upload.
Image