Tools
Free, browser-based utilities, no signup required. Pick a tool and get started.
Find the socket size for a metric or SAE bolt, or the bolt size for a measured nut, with a size chart and fit-checked substitutes.
Open XLSX, XLS, and other spreadsheet files locally with sheet search, formula display, pagination, and CSV export.
Generate strong, memorable passphrases from random words with live entropy.
Calculate semester GPA or cumulative CGPA in one place. Switch tabs to use preset or custom grading scales, per-course grade points, credit-weighted semester averages, a visual scale, grading reference, and copyable or downloadable reports.
Test keyboard events with live key details, layout progress, shortcut capture, and copyable key history.
Spin a secure random decision wheel with presets, removable winners, and copyable result history.
Create QR codes from URLs, WiFi, phone, and more. Customize colors and download PNG or SVG.
Split a bill and tip evenly with presets, live totals, and a copyable summary.
Exact age in years, months, and days with a birthday countdown and copyable summary.
Five percent modes with live results: percent of, change, add, and subtract.
Create strong random passwords with presets, strength meter, and entropy readout.
Create an invoice or quotation with editable line items, tax, discounts, local autosave and a polished PDF download.
Calculate BMI with your preferred weight and height units, see your category on a visual scale, and copy a summary.
A distraction-free online notepad that autosaves to your browser, with live word, character, and line counts.
Resize images to exact dimensions with live preview, scale presets, and local processing.
Beautify, validate, and minify JSON with syntax highlighting.
Flip a virtual coin for quick heads-or-tails decisions, with a running tally of results and streaks.
Compare text online, find line differences, ignore case or whitespace, and copy or download the diff.
Count words, characters, and sentences in any text instantly.
Focus with the Pomodoro technique: customizable work and break intervals.
Paste text to auto-redact emails, API keys, JWTs, webhooks, and other sensitive data.
Convert text to uppercase, camelCase, snake_case, and more.
Decode cron schedules into plain English with a field-by-field breakdown.
Generate random numbers in any range or roll virtual dice, with duplicates, sorting, and totals.
Convert length, weight, volume, area, speed, temperature, and data with live results.
Estimate reading and speaking time from word count, with character stats.
A tactile tally counter with big tap buttons, goals, presets, and keyboard shortcuts.
Resize dimensions while keeping a fixed aspect ratio, with simplified ratios.
Convert numbers between binary, octal, decimal, hex, and any base 2–36.
Live encode and decode text or files to Base64 in your browser.
Convert between HEX, RGB, and HSL with sliders and CSS-ready copy.
Generate Lorem Ipsum by paragraph, sentence, or exact word count, then copy and paste the placeholder text.
Convert Unix timestamps to dates and back. Supports ISO and local time.
Live percent-encode or decode URL components and full URLs.
Generate random UUID v4 and v1 identifiers instantly.
Create layered CSS box shadows with live preview, precise controls, presets, and copy-ready CSS.
Arrange JPG, PNG, and WebP images into a locally generated PDF with flexible page settings.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
Generate complementary, analogous, triadic, and other color harmonies from any base color.
Open and read CSV or TSV files locally, then search, sort, analyze columns, paginate, and export the filtered view.
Check the contrast ratio between two colors and test WCAG AA/AAA accessibility compliance.
Count down to any date and time with live updates, quick presets, and a copyable summary.
Find the sale price and how much you save after a percentage discount, with optional stacked discount and sales tax.
Calculate monthly loan payments (EMI), total interest, and a yearly amortization breakdown.
Write Markdown and preview rendered output or HTML source live in your browser.
A precise stopwatch with lap statistics, keyboard shortcuts, copy, and CSV export.
Convert date and time between time zones with presets, live results, and offset differences.
Build campaign tracking URLs with utm_source, utm_medium, utm_campaign, and more.
Check whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and other AI crawlers can access a page, and which robots.txt rule decides it.
Find the hex key for metric or inch cap, button, flat, and set screws, or see which screws a key fits, with a full size chart.
Look up diameter, cross-sectional area, resistance per length, and copper ampacity for any AWG wire gauge, in copper or aluminum.
Find the clearance hole and drill for metric (ISO 273) and inch bolts in every fit, plus counterbores for socket head cap screws.
See how savings grow with compound interest, regular contributions, and adjustable compounding frequency.
Create rounded corners visually and copy a ready-to-use CSS border-radius declaration.
Create frosted-glass CSS effects with live controls for blur, opacity, borders, and shadows.
Create linear and radial CSS gradients visually, then copy a ready-to-use background rule.
Convert CSV to JSON and JSON to CSV, with custom delimiters.
Find the exact span between two dates with live results and a copyable summary.
Convert number, letter, fractional, and metric drill sizes, or find the nearest drills to any size, with a full drill chart.
Score a page out of 100 for AI search readiness (crawler access, indexability, readable HTML, structure, citations, and schema) with prioritized fixes.
Combine multiple images into an animated GIF with reorderable frames, resolution presets, and adjustable delay, processed locally.
Escape HTML special characters or decode named and numeric entities, with optional Unicode encoding and plain-text output.
Compress JPG, PNG, and WebP images below a target KB limit and optional maximum dimensions, entirely in your browser.
Convert PNG, JPG, and WebP locally with quality controls, transparency options, and a downloadable preview.
See and strip EXIF, IPTC, and XMP data, including GPS location, from JPG, PNG, and WebP photos, entirely in your browser.
Convert IPv4 addresses, calculate CIDR subnets, and expand or compress IPv6 with live results.
Generate TypeScript types from JSON with nested objects, arrays, and unions. Copy or download a .ts file.
Decode and inspect a JSON Web Token’s header and payload, with expiry times in human-readable form.
Solve for voltage, current, resistance, or power: enter any two values and get the rest instantly, with the formula shown.
Check a URL’s Open Graph and Twitter Card tags, see what’s missing, and preview how it looks when shared on Facebook, X, and Google.
Test password strength with entropy, crack-time estimates, and improvement tips.
Combine multiple PDF files into one document locally.
Inspect PDF metadata and download a cleaned copy without common metadata fields.
Rotate every page in a PDF clockwise and download the result.
Extract selected pages from a PDF into a new document.
Re-save a PDF with object streams; this may reduce structural overhead but does not recompress images.
Render PDF pages as PNG images locally in your browser.
Build and debug regular expressions with live match highlighting, capture groups, and flag toggles.
Convert Arabic numbers and Roman numerals from 1 to 3999 with live results and a symbol reference.
Find the correct tap drill size for metric, UNC, or UNF threads at any percentage of thread engagement.
Strip extra spaces, tabs, blank lines, and line breaks from messy text with one click.
Encrypt and decrypt text with a password using AES-256, locally in your browser.
Alphabetize lists, sort numbered lines naturally, and remove duplicates with case and whitespace controls.
Inspect URL components and decoded query parameters, including repeated keys, without opening the address.
Calculate voltage drop over a wire run by gauge, length, current, and system voltage, and find the minimum gauge that stays under 3%.