Does resizing reduce image quality?

Downscaling always discards pixel data. Canvas resampling is decent but not as sharp as Lanczos (what Photoshop uses). For web thumbnails and social media, it’s perfectly fine. For print or professional retouching, use dedicated software.

Why would I pick WebP over JPEG?

WebP produces smaller files at equivalent visual quality—typically 25–34% smaller than JPEG. Every modern browser supports it. The only reason to stick with JPEG is if you need compatibility with very old software or email clients.

Image Resizer

About Image Resizer

Resizes images entirely in your browser using the HTML Canvas API—no upload to any server. Drop an image, pick a target size or choose from 10 platform-specific presets (Instagram Square, Instagram Story, Facebook Cover, Twitter Header, LinkedIn Banner, YouTube Thumbnail, HD, Full HD, 4K, Profile Picture), and export as JPEG, PNG, or WebP with adjustable quality from 10–100%. The tool shows the compression ratio so you know exactly how much smaller the output is.

10 presets tuned to real platform specs: Instagram Square (1080×1080), Instagram Story (1080×1920), Facebook Cover (820×312), Twitter Header (1500×500), YouTube Thumbnail (1280×720), and more
Canvas-based resizing runs entirely client-side—your images never leave your browser
Output format selection: JPEG, PNG, or WebP with a quality slider from 10% to 100%
Aspect ratio lock toggle prevents distortion when changing only width or height
Displays original size, output size, and compression percentage after each resize

Frequently Asked Questions

Does resizing reduce image quality?: Downscaling always discards pixel data. Canvas resampling is decent but not as sharp as Lanczos (what Photoshop uses). For web thumbnails and social media, it’s perfectly fine. For print or professional retouching, use dedicated software.
Why would I pick WebP over JPEG?: WebP produces smaller files at equivalent visual quality—typically 25–34% smaller than JPEG. Every modern browser supports it. The only reason to stick with JPEG is if you need compatibility with very old software or email clients.

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Calculators

Age Calculator — Calculate exact age in years, months, days, and hours from birth date.
Arithmetic Calculator — Basic calculator for add, subtract, multiply, divide.
Aspect Ratio Calculator — Calculate, convert, and lock aspect ratios for images, video, and screen resolutions.
Bandwidth Calculator — Calculate bandwidth needs for transfers and streaming.
Battery Bank Calculator — Calculate battery bank capacity and configuration for solar power systems.
Body Surface Area Calculator — Calculate body surface area from height and weight.
Concrete Calculator — Calculate how much concrete you need for a project.
Date Calculator — Find days between dates or add/subtract time.
Discount Calculator — Calculate sale prices and savings from percentage discounts.
Electrical Power Calculator — Calculate watts, volts, amps, and electricity costs.
Electricity Cost Calculator — Estimate how much an appliance costs to run.
Fabric Calculator — Calculate how much fabric you need for a project.
Freelancer Rate Calculator — Calculate what to charge based on income goals.
Fuel Economy Calculator — Calculate MPG or L/100km from distance and fuel used.
Graphing Calculator — Plot mathematical functions and equations on a graph.
IP Address Calculator — IPv4 subnet calculator: network, broadcast, mask, host range, special-use scope, binary, and subnet splitting.
IPv6 Subnet Calculator — IPv6 subnet calculator: network range, expand/compress, bit-accurate address type, reverse DNS, and subnet splitting.
Lawn Size Calculator — Calculate lawn area for fertilizer and seed quantities.
Meeting Cost Calculator — Calculate how much a meeting costs based on attendee salaries.
MTU Calculator — Find optimal MTU size for your network.
Ohms Law Calculator — Calculate voltage, current, resistance, or power using Ohm's law.
Ovulation Calculator — Estimate ovulation and fertile window dates.
Paint Calculator — Calculate how much paint you need for walls or rooms.
Percentage Calculator — Find percentages, percent change, and what percent X is of Y.
Pregnancy Calculator — Calculate due date and pregnancy milestones.
Recipe Nutrition Calculator — Calculate calories and macros for a recipe.
Resistor Color Code Calculator — Decode resistor values from color bands.
Solar System Sizing Calculator — Size a solar panel system for your energy needs.
Standard Deviation Calculator — Calculate mean, variance, and standard deviation.
Surround Sound Setup Calculator — Calculate speaker placement for surround sound.
Time Zone Calculator — Convert times between different time zones.
Unit Price Calculator — Compare prices per unit to find the best deal.

Converters

Binary Text Converter — Convert text to binary and binary to text.
CIDR to IP Range Converter — Convert CIDR notation to IP address ranges.
Color Code Converter — Convert colors between hex, RGB, HSL, and CMYK.
CSV to JSON Converter — Convert CSV data to JSON format.
Data Storage Converter — Convert between bytes, KB, MB, GB, TB, and more.
JSON to CSV Converter — Convert a JSON array of objects to CSV — nested keys flattened, columns merged, values RFC-4180 escaped.
JSON to YAML Converter — Convert between JSON and YAML in both directions, with auto-detection — for configs, pipelines, and manifests.
Markdown to HTML Converter — Convert Markdown to HTML.
Number Base Converter — Convert numbers between binary, octal, decimal, hexadecimal, and any custom base 2–36.
Roman Numeral Converter — Convert between Roman numerals and regular numbers.
Time Converter — Convert between hours, minutes, seconds, and more.
Unit Converter — Convert length, weight, temperature, and other units.
URL Encoder Decoder — Encode and decode URL strings.

Date & Time

Countdown Timer — Count down to any date or event.
Stopwatch — Stopwatch with lap times.
World Clock — See current time in cities around the world.

Development

Codec Detector — Detect audio/video codecs and check browser support.
Cron Expression Builder — Visually build cron expressions by clicking checkboxes and dropdowns — no syntax memorization required.
Cron Job Tester — Test cron expressions and see upcoming run times.
Environment Variable Manager — Edit and export environment variables (.env files).
Hash Generator — Generate MD5, SHA-1, SHA-256, and other hashes.
HTML Editor — Write HTML with live preview side by side.
JSON Formatter — Prettify, minify, and validate JSON.
JSON Schema Validator — Validate JSON against a JSON Schema.
JSON to Go Struct — Generate Go structs with json tags from a JSON sample — nested types, slices, and omitempty inferred.
JSON to TypeScript — Generate TypeScript interfaces from a JSON sample — nested types, optional keys, and unions inferred.
JSON Validator — Check if JSON is valid and find syntax errors.
JWT Decoder — Decode JWTs and view header, payload, and claims.
Regex Pattern Explainer — Explain what a regex pattern does in plain English.
Regex Tester — Test regex patterns with live highlighting, named & numbered capture groups, and a replace/substitution preview.
SQL Formatter — Format and beautify SQL queries with syntax highlighting and indentation.
Unix Timestamp Converter — Convert Unix timestamps to human-readable dates and dates back to Unix timestamps in seconds or milliseconds.
XML Formatter & Validator — Format, minify, and validate XML with error highlighting.
YAML Validator — Validate YAML syntax and find errors.

Educational

Flashcard Maker — Create flashcards for studying and memorization.
Grade Calculator — Calculate grades and what you need on finals.
Typing Speed Test — Test your typing speed and accuracy.

Finance

Breakeven Calculator — Calculate breakeven point, margin, and target profit.
CAGR Calculator — Calculate compound annual growth rate from start and end values.
Compound Interest Calculator — Calculate compound interest with contributions over time.
Currency Exchange Rate History — View historical exchange rates between currencies.
Depreciation Calculator — Calculate asset depreciation with yearly schedules.
Expense Splitter — Split bills among friends with uneven shares.
Loan Amortization Calculator — Generate loan payment schedules with principal/interest split.
Mortgage Calculator — Calculate monthly payments and total interest on a mortgage.
Paycheck Calculator — Estimate take-home pay after taxes and deductions.
Retirement Calculator — Project retirement savings and estimate if you're on track.
ROI Calculator — Calculate return on investment percentage and profit.
Rule of 72 Calculator — Estimate how long to double your money at a given rate.
Sales Tax Calculator — Calculate sales tax amounts and totals for purchases.
Simple Interest Calculator — Calculate simple interest balances with clear principal, rate, and time breakdowns.
Tax Calculator — Estimate income tax based on brackets, deductions, and filing status.
Tip Calculator — Quickly split bills with tip percentages, rounding options, and per-person totals.

Gaming

Dice Roller — Roll dice of any type for tabletop games.

Gardening

Companion Planting Guide — Find which plants grow well together in your garden.
Gardening Planner — Plan garden layouts and planting schedules by zone.

Generators

Barcode Generator — Create barcodes in Code 128, EAN, UPC, and other formats.
Calendar Generator — Create printable monthly or yearly calendars.
Character Name Generator — Generate random character names by genre and origin.
Citation Generator — Generate citations in APA, MLA, Chicago, and other formats.
Color Palette Generator — Generate harmonious color palettes from a base color.
CSS Gradient Generator — Create linear and radial CSS gradients visually.
Favicon Generator — Create favicons from images in multiple sizes.
Git Command Generator — Build git commands with a visual interface.
Haiku Generator — Generate random haiku poems.
Invoice Generator — Create invoices with line items, tax, and totals.
Lorem Ipsum Generator — Generate placeholder Lorem Ipsum text by paragraphs or words.
Markdown Table Generator — Create Markdown tables visually.
Open Graph Tag Generator — Generate Open Graph meta tags for social sharing.
Passphrase Generator — Generate memorable word-based passphrases using a 2048-word dictionary and cryptographic randomness.
Password Generator — Generate random passwords with custom length and characters.
QR Code Generator — Create QR codes for URLs, text, WiFi, and contacts.
Random Number Generator — Generate random numbers within a range.
Random Quote Generator — Get random inspirational quotes by category.
Random Team Generator — Randomly divide people into teams.
Reverse Text Generator — Reverse text, words, or flip text upside down.
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Username Generator — Generate random usernames.
UUID Generator — Generate UUIDs in v1, v4, and other formats.

Health

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Body Fat Calculator — Estimate body fat percentage from measurements.
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Language

Unicode Symbols Table — Browse and copy Unicode symbols and characters.

Media

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Speech To Text Converter — Convert speech to text in real time.
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Networking & IT

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Hosting Checker — Identify the web hosting provider, CDN, DNS, and email service for any domain.
IP Address Lookup — Display your public IP address, location, ISP, and network information.
Network Diagnostics — Analyze your network connection with DNS speed tests, latency measurement, WebRTC detection, and browser capability checks.
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Productivity

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Meeting Time Finder — Find meeting times that work across time zones.
Online Notepad — Simple notepad that saves in your browser.
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Weekly Schedule Planner — Plan your week with a visual schedule grid.

Reference

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HTML Entities Reference — Reference table of HTML character entities.
HTTP Status Codes Table — Reference table of all HTTP status codes.
Morse Code Chart — Morse code reference for letters and numbers.
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BBCode Editor — Edit BBCode with live preview for forum posts.
Markdown Editor — Write Markdown with live preview.
Markup Editor — Edit markup languages with syntax highlighting.
Morse Code Translator — Convert text to Morse code and back, with audio.
Palindrome Checker — Check if words, phrases, or numbers read the same forwards and backwards.
Readability Checker — Check reading level and readability scores for text.
Text Case Converter — Convert text between different cases: UPPERCASE, lowercase, Title Case, camelCase, etc.
Text Diff Checker — Compare two texts and highlight differences.
Text Repeater — Repeat any text or string a specified number of times with a custom separator.
Word Counter — Count words, characters, sentences, and paragraphs.
Word Rhyme Finder — Find words that rhyme with any word.

Utilities

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Business Jargon Translator — Decode corporate buzzwords into plain English.
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Password Strength Checker — Check how strong your password is.
PDF to Text Extractor — Extract text from any PDF file directly in your browser — no upload, no server, complete privacy.
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Color Picker — Pick colors and get hex, RGB, HSL values.
CSS Box Shadow Generator — Build and preview CSS box-shadow values with multiple layers, presets, and live preview.
HTML Encoder — Encode special characters as HTML entities.
HTTP Status Code Checker — Check any URL's HTTP status code and headers.
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Robots.txt Generator — Create robots.txt files for search engine control.
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