All Free Online Tools

Add page numbers to a PDF in your browser with header/footer positions, skip-cover defaults, page ranges, custom numbering, and private local export.

Calculate your exact age in years, months, weeks, days, hours, and minutes. Discover your zodiac sign, generation label, birth day of the week, and countdown to your next birthday — all instantly.

Remove image backgrounds instantly with AI — powered by RMBG-1.4 neural network running 100% in your browser. Replace backgrounds with colors, gradients, blur, or custom images. Free, private, unlimited.

Create better prompts for ChatGPT, Claude, Gemini, image AI, coding assistants, marketing, studying, and business workflows.

Convert between Square Meters, Square Feet, Acres, Hectares, and 10 area units with instant results, formula display, and multi-unit reference table.

Estimate car payments with vehicle price, down payment, trade-in, sales tax or VAT, fees, APR, loan term, extra payments, and amortization CSV.

Encode and decode Base64 strings instantly online. Convert text to Base64, decode Base64 to text with full UTF-8 and emoji support. Free and fast.

Calculate your Body Mass Index with a visual gradient scale, healthy weight range for your height, weight-to-target guidance, and detailed health category breakdown — in Metric or Imperial units.

Generate clean, convention-compliant git branch names from task descriptions, JIRA tickets, or any text input. Supports 12 prefix types, 4 naming conventions, and auto-detects ticket IDs.

Estimate daily calories, TDEE, weight loss calories, maintenance calories, and macro targets with practical safety flags and meal splits.

Convert text between 12 case formats: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, dot.case, path/case, and Inverse Case — with live preview and text stats.

Format, beautify, or minify JSON, JavaScript, CSS, and HTML instantly with Monaco-powered editing, validation, upload/download, and private browser processing.

Check foreground and background color contrast for WCAG AA and AAA, with live preview, CSS output, and readable results.

Generate color palettes from scratch or from images, build Tailwind-ready scales, check WCAG contrast, and simulate color blindness in your browser.

Project savings and investment growth with starting balance, regular contributions, return rate, compounding frequency, yearly breakdown, and CSV export.

Compress PDF files online with a quality slider, target size control, metadata cleanup, and private browser-based processing. No uploads.

Create a polished, role-specific cover letter with tone controls, job keywords, achievements, copy, and download.

Build, validate, explain, and copy cron expressions with next-run previews, plain-English schedule summaries, deployment snippets, and risk warnings.

Decode Certificate Signing Requests locally with subject and SAN parsing, key algorithm details, host coverage checks, readiness warnings, and OpenSSL-style summaries.

Generate SSL/TLS certificate signing requests and private keys locally in your browser with SAN validation, RSA/ECDSA keys, and OpenSSL command previews.

Convert CSV to JSON and JSON to CSV with quoted-field parsing, nested object flattening, delimiter controls, copy, and download.

Free online currency converter with live ECB exchange rates. Convert USD to INR, EUR, GBP, JPY and 30+ currencies instantly. Compare up to 10 currencies simultaneously with real-time rates.

Convert between Bytes, KB, MB, GB, TB, PB, and binary units (KiB, MiB, GiB, TiB) with instant results and formula display.

Compare text, code, JSON, XML, and config files side by side with syntax highlighting, inline view, whitespace controls, and private browser-based diffing.

Generate favicon PNGs, Apple touch icons, Android icons, manifest JSON, HTML tags, previews, and a ZIP download.

Convert HTML to clean Markdown locally with table and code support, upload, copy, download, and practical cleanup diagnostics.

Look up HTTP status codes with plain-English meanings, API guidance, SEO notes, retry rules, cache tips, headers, and copy-ready response examples.

Free online image compressor with quality slider, target size mode, format conversion (JPEG/PNG/WebP), batch processing, and before/after comparison. 100% client-side — your images never leave your device.

Convert images between JPG, PNG, and WebP locally with preview, quality control, background fill, and file size comparison.

Crop images online with social media aspect ratios, focal point controls, JPG/PNG/WebP export, quality diagnostics, and private no-upload processing.

Remove EXIF, GPS location, camera, timestamp, XMP, IPTC, and content credential metadata from JPG, PNG, and WebP images privately in your browser.

Resize images to exact pixel dimensions or social media sizes instantly. 27 presets for Instagram, Facebook, Twitter, YouTube, LinkedIn, and print. 100% client-side.

Convert images to PDF with custom page sizes, layouts, and quality. Combine multiple JPG, PNG, or WebP images into a single PDF. Drag to reorder pages. 100% client-side.

Extract text from images, screenshots, scanned notes, labels, and forms locally with OCR, confidence scoring, TXT export, and JSON diagnostics.

Create professional invoices with line items, tax, discounts, currency selection, notes, preview, and print-to-PDF export.

Free online JSON formatter, validator, and beautifier with tree view, auto-repair, TypeScript generator, and statistics dashboard. 100% client-side.

Decode JWT tokens online, inspect header and payload claims, read exp and iat timestamps, and spot auth mistakes without sending tokens anywhere.

Convert between Meters, Feet, Inches, Miles, Kilometers, Yards, and 12 length units with instant results, formula display, and multi-unit reference table.

Calculate monthly loan payments, total interest, payoff time, origination fees, extra payment impact, and amortization CSV for fixed-rate loans.

Free online Markdown editor with live preview, syntax-highlighted code blocks, formatting toolbar, rich text copy, and export to HTML & MD. 100% client-side.

Free online PDF merger with drag-to-reorder, page count preview, and instant merging. 100% client-side — your files never leave your device.

Generate SEO title, description, canonical, Open Graph, and Twitter Card tags with live search and social previews.

Estimate monthly mortgage payments with taxes, insurance, HOA, PMI, affordability ratios, rate stress testing, extra payments, and amortization CSV export.

Estimate OpenAI API token spend for GPT-5.5, GPT-5.4, and GPT-5.4 mini with cached input support and batch discount simulation.

Generate cryptographically secure random passwords with a visual strength meter, crack-time estimate, entropy calculation, and one-click presets for PINs, passphrases, and maximum-security keys.

Check password strength locally with entropy, crack-time estimates, pattern warnings, suggestions, and a strong password generator.

Reorder, rotate, delete, and clean PDF pages in your browser with thumbnail previews, blank-page detection, and private export.

Redact sensitive information from PDFs locally with smart PII detection, manual boxes, flattened export, and copyable audit notes.

Extract selectable text from PDF files locally with page-by-page output, OCR-needed diagnostics, search, copy, TXT download, and JSON report export.

Convert PDF pages into high-quality JPG images in your browser with quality control, render scaling, previews, and ZIP download.

Add text or logo watermarks to PDF files locally with smart draft defaults, page ranges, opacity controls, and copyable sharing notes.

Three instant percentage calculators in one: find X% of a number, calculate what percent X is of Y, and compute percentage change between two values — with formula display, quick presets, and copy-to-clipboard.

Create beautiful, branded QR codes with custom colors, dot styles, logo embedding, and multiple content types — URL, Wi-Fi, vCard, email, SMS. Export as PNG or SVG, 100% free, no sign-up.

Scan QR codes from images locally with URL safety preview, Wi-Fi parsing, copy, and JSON reports before opening risky links.

Pick names, giveaway winners, ranked choices, or random teams with private browser randomness, weighted odds, duplicate checks, and CSV export.

Extract receipt and invoice text, merchant, date, total, tax, phone, card ending, JSON, and CSV from images with private browser OCR.

Build, test, and debug regular expressions with real-time match highlighting, a token-by-token pattern explainer, 30+ ready-to-use templates, find & replace, and code generation in JavaScript, Python, Go, and PHP.

Build a fully customized ATS-friendly resume with 90+ layout presets, section controls, keyword scoring, impact checks, previews, and export tools.

Create robots.txt crawl rules with presets, custom disallow paths, sitemap directives, crawl delay, and AI crawler controls.

Convert annual salary to hourly, daily, weekly, biweekly, monthly, PTO-adjusted hourly, and simple after-tax estimates.

Calculate SHA-256, SHA-512, SHA-384, and SHA-1 hashes for files or text locally, compare expected checksums, and export a verification manifest.

Sign PDF files online with typed, drawn, or uploaded signatures, page placement controls, date stamps, audit notes, and private no-upload export.

Convert between km/h, mph, m/s, knots, Mach, and the speed of light with instant results and formula display.

Free online PDF splitter with 4 split modes — custom page ranges, every N pages, equal parts, or extract each page. ZIP download, 100% client-side.

Convert SVG code or files to transparent PNG images with custom width, height, preview, and local browser rendering.

Convert screenshots and scanned table images into spreadsheet-ready CSV with OCR, column detection modes, raw text review, copy, and download.

Convert accurately between Celsius, Fahrenheit, Kelvin, and Rankine with instant results, conversion formula display, and visual temperature scale.

Clean pasted text online by removing line breaks, duplicate lines, extra spaces, HTML tags, email quote marks, and hidden characters privately in your browser.

Listen to text with browser voices, adjustable rate, pitch, volume, pause, resume, word estimates, audio download, and private local playback.

Convert meeting times across global time zones with DST-aware offsets, working-hour hints, 12/24 hour formats, and summaries.

Test typing speed in WPM with accuracy, weak-key diagnostics, custom practice text, copyable results, and CSV progress export.

Convert Unix epoch seconds or milliseconds to readable dates, convert dates back to timestamps, and batch-convert values.

Encode URI components, encode full URLs, decode escaped URL strings, parse query parameters, and batch-process lines locally.

Build clean campaign tracking URLs with UTM source, medium, campaign, term, content, validation, and copy-ready output.

Generate UUID v4, UUID v7, and GUID lists locally with bulk output, format variants, timestamp insight, copy, and TXT/CSV/JSON download.

Convert between Liters, Gallons, Cups, Fluid Ounces, and 12 volume units with instant results, formula display, and multi-unit reference table.

Convert instantly between Kilograms, Pounds, Ounces, Grams, Stone, Carats, and 12 weight units with real-time results, formula display, and multi-unit reference table.

Count words, characters, sentences, paragraphs, and reading time in real time. Set writing goals with progress tracking, analyze keyword density, and check readability — all instantly in your browser.

Free online XML formatter, validator, minifier, and tree viewer with XPath copy, attribute sorting, XML stats, upload, and download. 100% client-side.

Generate a clean sitemap.xml from pasted URLs with dedupe, lastmod, robots.txt snippet, SEO limit checks, and XML, TXT, or CSV export.

Download public YouTube video thumbnails in HD, SD, HQ, medium, and default sizes from a URL, Shorts link, embed link, or video ID.