Free online developer tools utilities with zero download required.
JSON to CSV converter without upload private, plus JSON formatter, beautifier, minifier & validator.
Encode or decode strings and query parameters for safe web transmission.
Add line numbers to code, logs, or text with custom delimiters, zero-padding, or strip numbers.
Encode text to Base64 or decode Base64 strings with UTF-8 and URL-safe modes.
Convert article titles, headlines, and strings into clean, SEO-optimized URL permalink slugs.
Generate cryptographically secure Version-4 Universally Unique Identifiers (single or bulk batches).
Design frosted glassmorphism, soft drop shadows, and neumorphism effects with live visual sliders and generate clean CSS or Tailwind classes.
Generate instant fake REST API responses and structured JSON mock datasets for user profiles, products, orders, and blog posts.
Test regular expressions in real time with match highlighting, capture group breakdown, and ready-made presets for emails, URLs, and phone numbers.
Clean Illustrator, Figma, and Inkscape SVG files by stripping unused metadata, comments, empty tags, and minifying path coordinates.
Convert raw JSON objects into clean TypeScript interfaces, Python Pydantic models, and Go structs with type inference in one click.
Calculate exact color contrast ratio and verify WCAG 2.1 AA and AAA compliance for text, headings, and UI buttons with live visual preview.
Generate and decode 5-part cron schedule expressions with visual interval builders and human-readable English translations.
Compute SHA-256, SHA-512, SHA-384, and SHA-1 cryptographic file hashes locally in your browser to verify downloads and file integrity.
Calculate exact ETA and download duration for games, videos, and large files based on your internet bandwidth and file size.
Calculate daily and monthly gigabytes consumed by 4K/HD video, music, Zoom calls, and gaming against your ISP data cap.
Audit email subject lines and body copy for spam trigger words to maximize inbox deliverability and prevent junk folder placement.
Estimate how many 12MP/48MP photos, 4K videos, apps, and songs fit into 64GB, 128GB, 256GB, or 512GB phones.
Minify and clean SVG code, remove unwanted metadata and comments, and inspect vector graphics in real-time.
Pinpoint exact row numbers with broken commas, escaped quotes, and delimiter errors in large CSV datasets.
Map and transform mismatched CSV columns between different software schemas like Stripe, QuickBooks, and Salesforce.
Turn QA observations into structured, developer-ready Markdown tickets for Jira, GitHub Issues, and Linear.
Explore HTML/CSS hex color codes, RGB, HSL, CMYK conversions, shades, tints, color harmonies, WCAG contrast ratios, and curated web color palettes.
Comprehensive commands, recipe crafting, and server configuration guide for OmniTool and OmniTools mods on Minecraft Forge, Fabric, NeoForge, and Spigot/Paper.
Convert ASCII characters into Hexadecimal, Binary, and Decimal byte streams. Interactive bidirectional converter for web developers and computer science.
Inspect byte streams, hexadecimal memory offsets, and character payloads with side-by-side hexadecimal address alignment directly in your browser.
Convert JSON payloads into Excel CSV tables, XML document trees, YAML configurations, or TypeScript interface types with 100% browser-native speed.
Convert hexadecimal strings (e.g. 48 65 6c 6c 6f) into readable ASCII text characters and binary bytes instantly in your browser.
Convert plain text, URLs, and data into Base64 format or decode Base64 strings back to clean UTF-8 text with URL-safe encoding support.
Free online JSON converter to transform JSON payloads into Excel CSV tables, XML schemas, YAML configs, and formatted objects with 1-click copy.
Generate standard-compliant /llms.txt and /llms-full.txt files for AI crawlers, Claude, ChatGPT, Cursor, and Perplexity. Format documentation with 1-click download.