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/01 — Free online tools
Utilities for developers, designers, writers, marketers and founders. Every tool processes data locally — fast and private.
app_launcher — 116 tools installed
youtube_portal
16 YouTube creator tools — titles, tags, thumbnails, SEO, earnings
popular_right_now — 8 items
Format, validate and pretty-print JSON with configurable indentation and optional key sorting.
Convert CSV data into structured JSON with header detection, custom delimiters and quoted-value support.
Test regular expressions live against sample text with highlighted matches and capture-group inspection.
Convert Unix timestamps to human dates and back — with UTC, local and relative formats at a glance.
Generate cryptographically random UUIDv4 identifiers in bulk — with formatting options for any workflow.
Compute MD5 and SHA family hashes locally in your browser — for checksums, cache keys and integrity checks.
Encode text to Base64 or decode it back — UTF-8 safe, with a URL-safe alphabet for tokens and links.
Decode JWT headers and payloads instantly to inspect claims, expiry and algorithm — no signature verification.
developer — 20 items
JSON, regex, cron, encoding, JWT and everyday engineering utilities.
Format, validate and pretty-print JSON with configurable indentation and optional key sorting.
Convert any JSON document into clean, human-friendly YAML — perfect for config files and CI pipelines.
Turn YAML configuration into JSON instantly — great for validating CI configs and API payloads.
Convert CSV data into structured JSON with header detection, custom delimiters and quoted-value support.
Flatten a JSON array of objects into a spreadsheet-ready CSV — one level of nesting handled automatically.
Validate XML against the browser parser and re-indent it with consistent, readable structure.
Convert XML into structured JSON — attributes become @keys and repeated elements become arrays.
Test regular expressions live against sample text with highlighted matches and capture-group inspection.
Get ready-made regular expressions for emails, URLs, dates, IPs and more — with explanations and flag suggestions.
Build cron schedule expressions from common presets or custom fields — with a human description and next run.
Paste any cron expression and get a plain-English schedule breakdown plus the next predicted run time.
Convert Unix timestamps to human dates and back — with UTC, local and relative formats at a glance.
Measure the exact gap between two dates — days, hours, minutes, weeks and business days included.
Convert a moment between major time zones using the browser Intl engine — no server round-trips.
Generate cryptographically random UUIDv4 identifiers in bulk — with formatting options for any workflow.
Compute MD5 and SHA family hashes locally in your browser — for checksums, cache keys and integrity checks.
Encode text to Base64 or decode it back — UTF-8 safe, with a URL-safe alphabet for tokens and links.
Percent-encode or decode URLs and query values — with component and full-URI modes for safe links.
Decode JWT headers and payloads instantly to inspect claims, expiry and algorithm — no signature verification.
Create signed HS256 test JWTs from your own payload — ideal for mocking auth flows in development.
web — 20 items
Formatters, minifiers, markdown and CSS generators for front-end work.
Re-indent messy HTML into clean, readable markup — safe on inline scripts and styles.
Strip comments, collapses whitespace and trims tag padding — while keeping pre, textarea, script and style blocks intact.
Expand minified or hand-tightened CSS into a consistent, readable stylesheet.
Compress stylesheets by removing comments and redundant whitespace — string literals and calc() expressions are preserved.
Re-indent minified or squashed JavaScript into readable, consistently indented code — strings and template literals stay intact.
Safely strip comments, indentation and blank lines from scripts — a conservative pass that never merges lines or touches strings.
Turn cramped one-line queries into readable, consistently indented SQL — standard SQL, MySQL and PostgreSQL dialects.
Compress SQL into one dense line — strips -- and /* block */ comments safely (even inside strings) and collapses whitespace.
Write Markdown with a live rendered preview — headings, emphasis, lists, links, code and quotes as you type.
Scaffold clean Markdown tables from a header list — aligned columns, dash placeholders, HTML preview included.
Convert HTML articles, docs or emails into clean Markdown — headings, links, images, lists and code blocks handled.
Render Markdown into HTML — headings, lists, tables, code and links — with a live preview of the result.
Pick a color and read it in HEX, RGB, HSL and CMYK at once — plus relative luminance for contrast checks.
Compose linear or radial gradients visually and copy the one-line background CSS — up to three color stops.
Dial in offset, blur, spread, color and inset — copy production-ready box-shadow CSS with a live preview.
Set each corner radius independently (px or %) and copy the shorthand border-radius CSS with a live preview.
Generate fluid clamp() font sizes that scale smoothly between a min size on small screens and a max size on large ones.
Emit documented @media queries for Tailwind, Bootstrap or a custom range — mobile-first and desktop-first sides included.
Render an initial-based favicon on canvas at every standard size (16 → 512) — download the PNGs and copy the <link> tags.
Strip comments, metadata and Inkscape/Sodipodi editor leftovers from SVG files — drop redundant width/height and shrink the markup.
security — 10 items
Passwords, IP math, headers and protocol lookups that run offline.
Estimate a password’s entropy, detect common patterns and see how long an offline attack would plausibly take.
Create cryptographically random passwords with full control over length and character sets — generated on-device.
Break down any IPv4 or IPv6 address structurally — class, type, integer, hex and binary forms — computed offline.
Compute network, broadcast, usable host range, mask and wildcard from an IP and CIDR — plus class and private-range flags.
Convert an IPv4 address to its integer form or back — with hex, binary and octal views for configs and databases.
Look up any HTTP status code — what it means, when the server sends it and what to do about it.
Paste raw response headers and get an instant security audit — HSTS, CSP, frame options, cookie flags and info leaks.
Decode any User-Agent string into browser, engine, OS, device type and bot detection — regex-based, fully offline.
Convert file extensions to MIME types and back — set the right Content-Type for downloads, uploads and configs.
Paste raw dig output or zone-file lines and get a clean, validated table — TTLs, classes and record data checked per type.
design — 10 items
Images, favicons, QR codes and OG graphics — right in the browser.
Shrink JPEG, PNG and WebP files in your browser — quality slider, side-by-side preview and before/after byte counts, zero uploads.
Resize images to exact pixel dimensions or a percentage — aspect-ratio lock, high-quality resampling, fully offline.
Convert between PNG, JPEG and WebP in the browser — with a background fill option for flattening transparency.
Turn an image into a Base64 data URI — ready for inline CSS backgrounds, HTML img tags or JSON payloads.
Paste a Base64 string or data URI and get the image back — with format sniffing, size and dimension info.
Rasterize SVG logos and icons to crisp PNG at any scale — 1×, 2× and 3× exports rendered locally.
Render labelled placeholder images in any size and color — vector SVG or PNG, drawn locally in your browser.
Generate QR codes for URLs, Wi-Fi, vCards or plain text — downloadable PNG with error-correction and color options.
Upload a photo or screenshot of a QR code and read its contents — decoded locally, nothing uploaded.
Design 1200×630 social share images with a gradient, site name and wrapped headline — rendered on canvas, saved as PNG.
text — 15 items
Counters, case converters, cleaners and generators for writers.
Count words, characters, sentences and paragraphs — with reading and speaking time estimates as you type.
Count characters, letters, digits and spaces — and see how the text fits inside common platform limits.
Count sentences with abbreviation-aware splitting — plus average length, the longest sentence and question count.
Count paragraphs split on blank lines — with word and character totals plus shortest and longest paragraph sizes.
Estimate how long a text takes to read or present — tuned to your own reading speed.
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more — in one click.
One-pass cleanup for messy pasted text — trim lines, collapse spaces, drop empty lines, strip HTML and fix straight quotes.
Delete repeated lines while keeping the first occurrence — with trimming and case-insensitive matching options.
Find words repeated across a text — ranked table with counts, filters for minimum length and case sensitivity.
Replace every occurrence in a block of text — plain matches, whole words or full regular expressions with capture groups.
Sort lines alphabetically, numerically, by length — or shuffle and reverse them — with dedupe and case-insensitive options.
Turn any headline into a clean, lowercase URL slug — diacritics stripped, separators normalized, SEO-friendly.
Generate classic placeholder text by paragraphs, sentences or words — with optional HTML wrapping for mockups.
Generate random words, sentences, paragraphs or person names for placeholders, seed data and quick mockups.
Backslash-escape every Markdown metacharacter so asterisks, underscores and brackets display literally instead of formatting.
seo — 10 items
Meta tags, schema markup, sitemaps and SERP previews.
Generate a complete, honest <head> block — title, description, robots, canonical, Open Graph and Twitter cards in one snippet.
Build a correct robots.txt — allow and disallow rules, crawl-delay, sitemap reference — without guessing the syntax.
Build a valid XML sitemap from your URLs — with change frequency, priority and lastmod, ready for Search Console.
Normalize messy URLs and emit <link rel="canonical"> tags — force HTTPS, strip parameters and control trailing slashes.
Generate structured data in JSON-LD for organizations, articles, FAQs and breadcrumbs — ready to paste into your <head>.
Build FAQPage JSON-LD from up to three question/answer pairs — the structured data behind expandable FAQ rich results.
Build BreadcrumbList JSON-LD from a base URL and a name/path list — the structured data behind breadcrumb search results.
Build LocalBusiness JSON-LD with a full PostalAddress and GeoCoordinates — the structured data local SEO starts with.
Preview how your page listing is designed to appear in Google — title, breadcrumb and description with truncation warnings.
See which words and phrases dominate a page — 1, 2 and 3-word frequencies with percentages, stop words filtered.
marketing — 10 items
UTM links, hashtags, captions and ad-copy checks for campaigns.
Tag campaign links with UTM parameters so analytics can attribute every visit — properly encoded, existing params preserved.
Check one text against every major platform’s character limit at once — with truncation warnings for fold lines.
Tidy bio drafts into compact, single-spaced or airy line formats — with a live 150-character budget check.
Check a video title against YouTube’s 100-character cap — with caps-ratio, number and emoji verdicts for click-through.
Mock up a 1280×720 (16:9) thumbnail on canvas — bold, split or minimal layout with headline, accent bar and badge.
Every asset size for a platform — feed, story, cover, thumbnail — as a table plus a copyable resize list for your export tool.
Dedupe, normalize and cap hashtag sets — strips invalid characters, merges case variants and enforces your limit.
Clean up captions for publishing — move hashtags to the end, normalize spacing, and break sentences onto their own lines.
Check ad copy against every major placement limit — plus power-word and call-to-action detection for punchier lines.
Generate consistent campaign names from brand, objective, channel and date — ten candidates in mixed naming conventions.
business — 5 items
Pricing, margins, rates and project estimates for founders.
Four percentage problems in one tool — find a percentage, reverse it, measure change over time or compare two values.
Stack a discount, tax and shipping onto any price and see exactly what you — or your customer — will pay.
Convert cost and price into margin and markup — and finally see the difference between the two.
Work backwards from the income you need to the hourly rate you must charge — expenses, tax and non-billable time included.
Turn scope counts — screens, features, integrations — into a transparent duration and cost range you can sanity-check quotes against.
youtube — 16 items
Titles, tags, thumbnails, chapters and channel-growth math for creators — all in the browser.
Turn one keyword into 8 click-worthy title ideas in your chosen format — each scored against the 60-character search cutoff. Runs entirely in your browser.
Build a full SEO description — 150-character hook, keyword body, timestamps block, links and 3 hashtags — from a topic and keywords. Runs entirely in your browser.
Generate 20–30 tags mixing broad, long-tail and seed-keyword variants — ordered with your primary keyword first and capped at YouTube’s 500-character budget.
Paste a messy tag blob — commas, newlines, quotes, hashtags — and get a clean, deduped, alphabetized list with a 500-character budget check.
Generate 12 hashtags in three reach tiers — mega, mid and niche — built from your topic. Only the first 3 ever show above the title, so the tiers matter.
Audit a title + description paste against 10 YouTube ranking and packaging checks — score out of 100 with a fix for every failed item. Runs 100% in your browser.
Design a 1280×720 YouTube thumbnail — upload your own photo and overlay huge text, or start from a bold color layout. Three proven layouts, your accent color, downloadable PNG. Runs entirely in the browser.
Paste any YouTube link and get every thumbnail size YouTube stores for that video — HD preview grid plus one-click copy of each CDN URL. Runs entirely in the browser.
Turn a topic and target length into a timestamped script skeleton — hook, section beats and CTA placed where retention math wants them.
Generate 6 opening hooks for a video topic — pattern interrupts, result-first, curiosity gaps — each with (pause) delivery markers. Runs in your browser.
Generate 10 channel name ideas from a niche and a seed word — each with matching @handle and .com-style domain candidates. Runs 100% in the browser.
Generate 10 concrete video concepts for your niche — each framed as a ready-to-shoot title plus the angle that makes it work. Deterministic, in-browser.
Paste rough timestamp notes and get a clean, YouTube-valid chapters block (or YAML) — with validation for the 0:00 start, ascending order and count.
Calculate engagement rate from views, likes and comments — with per-1,000-view stats and honest benchmark context. Runs 100% in the browser.
Estimate monthly and yearly AdSense revenue from views and CPM — with an honest RPM range that accounts for YouTube’s 45% cut and unmonetized views.
Paste any YouTube link format — watch, youtu.be, Shorts, embed, live, playlist or even iframe code — and get clean IDs, share URLs and an embed snippet.