Calculations, Code & Document Utilities

Future value with daily, monthly, quarterly, or annual compounding.

Monthly mortgage payment, total interest, and payoff for a balance, rate, and term.

Measure the profitability of an investment quickly.

Wealth generation through systematic monthly investments.

Project how a one-time investment can grow with compounding.

Estimate maturity value for a fixed-rate bank deposit.

Monthly deposit that grows a balance to a target by a deadline.

Corpus that can fund inflation-adjusted spending for a chosen number of years.

Future price and purchasing-power change after a chosen inflation rate and number of years.

Interest saved and months removed when an extra EMI or principal payment is applied.

Reducing-balance car-loan EMI, total interest, and total amount payable.

Find a percentage of a number or what percent one value is of another, with steps.

Calculate percentage increase or decrease from an original value to a new value.

Recover an original amount before a percentage increase or decrease.

Break down sale savings, tax on the reduced price, and the final amount.

Formats, validates, and minifies JSON, and can emit YAML or TypeScript.

Encode and decode strings to and from Base64 format.

Decode, verify and inspect JSON Web Tokens securely.

Generate, parse and explain cron expression schedules.

Test and debug Regular Expressions with live highlighting.

Encode and decode URLs or URI components instantly.

Generate and verify Bcrypt password hashes securely.

Generate SHA hashes for text or files using Web Crypto APIs.

Convert cURL commands into Fetch, Axios, and Python snippets.

Convert Unix seconds, milliseconds, and date strings instantly.

Compare two JSON payloads and inspect exact field-level changes.

Generate secure v4 UUIDs in bulk effortlessly.

Converts YAML to JSON with yaml.load, or JSON to YAML with yaml.dump. A parse error is shown.

Formats XML with DOMParser and shows the browser parsererror text when the markup is invalid.

Checks JSON data with AJV against a JSON Schema and lists each error path and message.

Search common HTTP response codes by number, name, category, or meaning.

Find common MIME media types from a file extension or content type.

Adds utm_source, utm_medium, and utm_campaign to an absolute URL with URLSearchParams. Term and content are optional.

Writes a robots.txt with a user-agent, Allow and Disallow lines, and an optional sitemap URL.

Writes one alternate link tag per language and URL pair. It does not add the reverse tags.

Builds FAQ, HowTo, or Product JSON-LD. A schema.org validator is not run.

Encodes &, <, >, and quotes. Decoding also accepts numeric character references. The text stays in the page.

Turn a title into a lowercase hyphenated URL slug, stripping accents and punctuation.

Turns read, write, and execute checkboxes into a 3-digit octal mode and an rwx string. The command has no filename.

Converts a headered CSV to JSON objects, or an array of objects to CSV. Cell values stay strings.

Converts CSV or tab-separated data into aligned GitHub-flavored Markdown tables. Kept 100% in your browser.

Converts newline-delimited JSON (NDJSON / JSONL) files into clean tabular CSV with automatic header detection.

Flattens XML elements and repeating record trees into tabular CSV format for spreadsheets. 100% private in-browser.

Generates clean TypeScript interfaces and type definitions from JSON data. Processed client-side.

Converts between SubRip (.srt) and WebVTT (.vtt) caption formats instantly in your browser with zero uploads.

Extracts clean dialogue and plain text transcripts from SRT or VTT subtitle files, stripping timestamps and formatting tags.

Sync out-of-time subtitles by adding or subtracting milliseconds and adjusting frame rates (23.976, 24, 25, 29.97 fps).

Converts GPS tracks and waypoints between GPX and Google Earth KML format with zero server uploads.

Converts GeoJSON features (Points, LineStrings, Polygons) to Google Earth KML placemarks client-side.

Converts tabular spreadsheet coordinates (latitude, longitude, name) into Google Earth KML placemarks.

Shifts a Discord snowflake 22 bits and adds the 2015 Discord epoch. The id is not sent to Discord.

Compress CSS to reduce file size.

Minify and clean JavaScript code.

Optimize HTML structure.

Create custom barcodes (EAN, UPC, etc).

Visually build SQL queries.

Beautify and debug SQL queries.

Create beautiful code screenshots.

Preview pages on social media.

Builds a password with Math.random from the selected sets. The default length is 16.

Creates title, description, and social meta tags for a page.

Compare two texts and find differences.

Visualize merge, rebase, and git flow.

Remove simple backgrounds locally, refine with brushes, and export a transparent PNG.

Reduce image size with adjustable quality and target-size controls.

Freehand vector drawing canvas with 7 realistic pens (pencil, ballpoint, fineliner, marker, highlighter, brush, fountain pen), area eraser, and SVG/PNG export.

Convert images, videos, and GIFs into dithered dot art or ASCII with interactive physics repulsion, WebM export, and React/JS code export.

Apply retro 1-bit, Floyd-Steinberg, Bayer ordered, GameBoy, CGA, and pixel art dithering to images and videos live in browser.

Interactive real-time GLSL fragment shader editor & playground. Live preview, Shadertoy uniforms, raymarching SDFs, presets, and code export.

Design beautiful animated shader-based background images for wallpapers, social headers, and website hero sections.

Tap-to-reveal PNG for X and Twitter. Timeline preview versus opened view, brush masks, PNG8.

Crop a photo to 16:9 and split it into 3 equal vertical parts for X, Instagram, and carousels. Client-side PNG export.

Convert seamlessly between HEX, RGB, HSL and CMYK color codes with palette generation.

Visually build CSS Grid layouts with rows, columns, gaps, and code export.

Shows photo metadata. The download strips JPEG EXIF, XMP, IPTC, and comments, or PNG metadata, without re-encoding pixels.

Reads pixel width and height, simplifies the ratio by the greatest common divisor, and scales one side in proportion.

Recognizes English text in JPG, PNG, and WebP images, with recognition kept in the browser.

Measure the contrast ratio of two hex colors against WCAG AA and AAA text thresholds.

Create realistic fake tweet screenshots.

Creates styled text for an Instagram bio.

Draws an image on a canvas and saves PNG, JPEG, or WebP. The file is not uploaded.

Resize images to specific dimensions.

Create beautiful CSS gradients.

Generate CSS glassmorphism effects.

Interactively learn and test Flexbox.

Design buttons and copy CSS code.

Generate beautiful color palettes from a base color.

Design CSS box shadows with live preview.

Create favicons from emoji or text.

Combines PDF files in the chosen order. The files stay in the browser.

Renders each PDF page as a PNG or JPEG in the browser.

Combines JPG, PNG, and WebP images into one PDF in the browser.

Extracts selected pages or ranges with pdf-lib. The PDF is not uploaded.

Reorders, rotates, and removes PDF pages, with the file kept in the browser.

Adds page numbers with pdf-lib. The PDF is not uploaded.

Draws centered Helvetica text on each page. Size, opacity, and angle can change. The color is fixed, and the PDF is not uploaded.

Reads and writes PDF title, author, subject, keywords, creator, and producer with pdf-lib. The file is not uploaded.

Extracts selectable text with pdf.js, one block per page. A scanned page returns no text. The PDF is not uploaded.

Stamps a prefix, a zero-padded number, and a suffix in Helvetica on each page. The PDF is not uploaded.

Detects and removes empty or blank pages from a PDF with an adjustable sensitivity slider. Processed 100% in your browser.

Resize PDF pages between US Letter and ISO A4 dimensions with proportional scaling. The file is not uploaded.

Splits a PDF into separate chapter files using document outline bookmarks. Processing stays in your browser.

Reverses the sequence of pages in a PDF document in one click. 100% private in-browser processing.

Interleaves an empty blank page after every page of your PDF for double-sided printing or note taking.

Combines two PDF pages side-by-side onto a single sheet for compact reading and booklet printing.

Flattens interactive form fields and removes annotations to prevent accidental edits or disclosure.

Create polished resumes with a live LaTeX editor and text-based PDF export.

Convert length, mass, temperature, and binary data units.

Generate placeholder paragraphs, words, or HTML for design mockups.

Track body mass index and health metrics.

Standard and scientific math operations.

Age in years, months, and days from a date of birth and today's local date.

Precision chronograph with laps.

Convert dates across time zones.

Create customizable QR codes.

Case converter, word counter, and text cleaner.

Write and preview Markdown in real-time.

Create marriage biodata PDFs with religion-based and modern templates.