Planned tool
This tool is part of the larger library roadmap. It is shown here to test navigation, scale, and product packaging for a much larger catalog.
Format data, inspect domains, convert text, generate configs, and run web checks from one focused workspace. Local where possible, clearly marked when network access is required.
This tool is part of the larger library roadmap. It is shown here to test navigation, scale, and product packaging for a much larger catalog.
Choose an output mode, then run. Copy and clear live next to the data.
Decode JWT header and payload locally. Signature verification is intentionally not included in this preview.
Encode and decode Unicode text locally.
Encode or decode URL components without leaving the browser.
Convert Unix timestamps to readable dates, or parse a date string into Unix time.
Generate UUID v4 values locally using browser crypto.
Generate SHA hashes locally with Web Crypto.
Test JavaScript regular expressions against sample text.
Preview common Markdown syntax locally with a lightweight parser.
Inspect public TLS certificate details through the local preview backend.
Resolve public A/AAAA addresses through the local preview backend.
Fetch response headers for a public URL through the local preview backend.
Check a public URL status, final URL, response headers, and rough latency.
Trace a public URL redirect chain without crawling the whole site.
Fetch robots.txt for a public site and summarize sitemap and disallow signals.
Fetch an XML sitemap and count URL or nested sitemap entries.
Send a lightweight OPTIONS preflight to inspect CORS response headers.
Look up public domain or IP registration data through RDAP.
Resolve public host addresses and reverse DNS in one short request.
Check common DNS record types through DNS-over-HTTPS.
Convert simple CSV data into JSON locally. Good for quick fixtures and imports.
Convert CSV text into an Excel-compatible spreadsheet file locally.
Extract the first worksheet from a simple XLSX file and convert it to CSV locally.
Convert HEX colors to RGB and HSL values.
Check WCAG contrast ratio for foreground and background colors locally.
Create a CSS linear gradient with local preview and copyable CSS.
Generate cryptographically backed random integers or decimals locally.
Create a QR-style code image locally for links, short notes, and quick sharing.
Calculate percentages, ratios, and percentage change without leaving the page.
Add or subtract days, then compare two dates in local time.
Calculate age in years, months, days, and next birthday distance.
Generate Code 39 barcodes locally as SVG for labels and test data.
Resize PNG, JPG, and WebP images in the browser with no upload.
Compress images locally by resizing and tuning JPEG/WebP quality.
Crop an image by pixel coordinates locally and download PNG output.
Convert common length, weight, area, volume, speed, and temperature units.
Convert PNG images to JPG locally with a white background fill.
Convert JPG or JPEG images to PNG locally using browser canvas.
Rasterize SVG markup into a downloadable PNG locally.
Convert PNG, JPG, and supported browser images to WebP locally.
Generate common favicon PNG sizes and a web manifest locally from one image.
Convert an image file into a Base64 data URL locally.
Click an image preview to sample a pixel color and copy HEX/RGB values.
Convert WebP images to PNG locally using browser canvas.
Convert WebP images to JPG locally with background and quality controls.
Inspect common JPEG EXIF metadata locally without uploading the image.
Strip image metadata by re-encoding pixels locally in the browser.
Add a text watermark to an image locally and download the result.
Combine multiple PDF files locally in your browser.
Split a PDF into smaller files and download them as a ZIP.
Create a new PDF from selected pages or ranges.
Remove selected pages and download a cleaned PDF.
Rotate all pages or a selected range, then download the updated PDF.
Build a new PDF from a custom page order.
Turn PNG and JPG images into a single PDF locally.
Render selected PDF pages to JPG images in your browser.
Render selected PDF pages to PNG images locally.
Raster-compress selected PDF pages locally by rebuilding them as JPEG-backed PDF pages.
Add a visible text signature or stamp. This is not certificate signing.
Add a visible diagonal text watermark to every page locally.
Add page numbers to a PDF locally with position and starting number controls.
Edit title, author, subject, and keywords metadata locally.
Estimate monthly payments, total repayment, and interest for a fixed-rate loan.
Project future value from an initial balance, recurring deposits, and compound growth.
Calculate sale price, savings, tax, subtotal, and total after a discount.
Split a bill with tip, tax, and per-person totals.
Add or remove VAT from an amount and see net, VAT, and gross values.
Calculate gross profit, margin, markup, and profit per unit locally.
Calculate return on investment, net gain, multiple, and annualized ROI.
Calculate break-even units, sales revenue, contribution margin, and target profit units.
Create a clean HTML and plain-text email signature from local form fields.
Generate a lightweight HTML invoice from line items without saving data anywhere.
Turn structured career notes into a clean resume in text and HTML.
Convert a date and time across common business time zones.
Count words and characters, trim text, collapse whitespace, and deduplicate lines.
Escape or unescape HTML entities for snippets and templates.
Generate local random passwords using browser crypto.