Pixel dimensions (width × height) define how many individual dots make up an image. Physical print size depends on both pixel dimensions and DPI (dots per inch). A 1200×1200 px image at 300 DPI prints at 4×4 inches; the same file at 72 DPI would be 16.7×16.7 inches on screen. For web use, only pixel dimensions matter — DPI metadata is irrelevant in browsers.
Redimensionador de Imagens
Redimensione Imagens Precisamente
Redimensione imagens para qualquer dimensão. Pixels, porcentagem ou proporção.
Qualquer dimensão
Manter proporção
Processamento em lote
Arraste seu arquivo aqui
ou ou procure
JPG, PNG, WebP, GIF • Up to 100 MB
Quick Presets
px
px
Output: —
Aguardando upload...
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Falha na conversão
Falha na conversão
Seguro e Privado
Arquivos apagados em 2h
Processamento Rápido
Nenhuma conta necessária
Ultra Rápido
How to Convert
Converta qualquer arquivo em segundos — sem software, sem cadastro necessário.
01
Enviar
Envie seu arquivo de áudio
02
Escolher formato
Selecione o formato de saída
03
Baixar
Obtenha seu arquivo convertido
Por Que EasyConv
Why Use EasyConv
Professional-grade conversion with features designed for real-world workflows.
Controle de qualidade
Ajuste as configurações de qualidade.
Percentage Scaling
Scale down to 50% or up to 200% of the original size without worrying about exact pixel counts.
Aspect Ratio Lock
Lock the aspect ratio so entering one dimension automatically calculates the other — no stretching.
Sem perda
Sem perda de qualidade na conversão.
Upscale & Downscale
Make images larger or smaller. Downscaling uses Lanczos resampling for the sharpest results.
Processamento seguro
Arquivos processados com segurança.
300+ Formatos
Supported Formats
Detailed breakdown of every format supported by this converter.
| Format | Description | Extension | Use Case |
|---|---|---|---|
| JPG | Resized JPEG with quality control | .jpg |
Web photos, email attachments, social posts |
| PNG | Lossless resized PNG with transparency | .png |
UI assets, logos, screenshots |
| WEBP | Resized WebP for optimal web delivery | .webp |
Website images, Next.js Image optimization |
| GIF | Resize static or animated GIFs | .gif |
Animated thumbnails, icon sets |
| BMP | Lossless bitmap resizing | .bmp |
Windows desktop backgrounds, legacy apps |
| TIFF | High-fidelity TIFF resize for print | .tiff |
Print production, archival images |
3 Passos Simples
Frequently Asked Questions
Everything you need to know about this conversion tool.
Yes — enable the aspect ratio lock. When you enter a width, the height is calculated automatically to maintain the original proportions.
You can resize up to 10,000 × 10,000 pixels. Very large upscaling may reduce sharpness — for AI-powered upscaling with detail enhancement, use our Image Upscaler tool.
Single-file resizing is available for free. Bulk resizing via API or batch mode is available for registered users on the Pro plan.
We use Lanczos resampling for downscaling (sharpest results) and bicubic interpolation for upscaling, giving smooth results without jagged edges.
By default the output is the same format as your input. You can also choose a different output format in the options panel.
Common presets: Instagram post 1080×1080, Twitter header 1500×500, Facebook cover 820×312, LinkedIn banner 1584×396. Enter these exact values in the width and height fields.
12M+ usuários confiam em nós
Who Uses This Tool
Real-world use cases from professionals across different industries.
Social Media Manager
Resize for Social Platforms
Quickly resize photos to exact Instagram, Twitter, Facebook, or LinkedIn dimensions without distortion using the aspect ratio lock.
Web Developer
Generate Responsive Breakpoints
Create 1x, 2x, and 3x versions of the same image for responsive srcset attributes and retina display support.
E-commerce Seller
Standardise Product Thumbnails
Resize product images from varied camera sizes to a uniform 800×800 or 1000×1000 for consistent product listing grids.
Email Marketer
Size Images for Email Templates
Resize images to your email template width (typically 600px) before embedding to prevent broken layouts in Gmail and Outlook.
App Developer
Create App Icon Sizes
Resize a master icon to all required iOS and Android sizes (1024px, 512px, 192px, 144px etc.) in quick succession.
Designer
Resize Mockups for Presentations
Scale mockup images to exact slide dimensions (1920×1080, 1280×720) so they fill your PowerPoint or Keynote perfectly.
Por Que EasyConv
Comparação
Veja como nos comparamos a outras soluções
| Feature |
Our Tool EasyConv |
Photoshop | Other Online |
|---|---|---|---|
| Qualidade | |||
| Percentage scaling | Varies | ||
| Bloqueio proporção | Varies | ||
| Preserva transparência | Varies | ||
| Redução Lanczos | |||
| Sem instalação | |||
| Arquivos excluídos (2h) | Varies | ||
| API access | Pro |
Technical Specifications
Technical Specifications
Detailed technical information about our conversion engine.
Limits
- Max file size: 100 MB (free)
- Max output resolution: 10,000 × 10,000 px
- Max upscale: 200% (use AI Upscaler for beyond 200%)
Pillow
Lanczos
bicubic
JPEG
PNG
WebP
GIF
Engine
Pillow 10.x (Lanczos / bicubic resampling)
Qualidade
Lossless for PNG/WebP; JPEG quality 90 default (adjustable)
Speed
Resizing completes in under 2 seconds for most images
Security
HTTPS transfer · isolated temp dir · auto-purged in 2 h
Downscale algo
Lanczos (sharpest)
Upscale algo
Bicubic interpolation
Ratio lock
One dimension auto-calculates
Guia completo
Image Resizing Guide: Pixels, Aspect Ratios & Social Media Sizes
Resizing images correctly is a fundamental skill for web developers, designers, and content creators alike. Getting dimensions wrong can break layouts, slow pages, or produce blurry visuals. This guide covers everything from resampling algorithms to social media presets.
Understanding Pixel Dimensions vs Physical Size
Lanczos vs Bicubic: Which Resampling Is Best?
Lanczos resampling samples a wider neighbourhood of pixels and applies a sinc-based filter, preserving edge sharpness better than bicubic when reducing image size. It is the gold standard for downscaling photographs. Bicubic uses a 4×4 pixel grid and is faster — suitable for upscaling where you want smooth results. Nearest-neighbour (not used here) simply duplicates pixels and is only suitable for pixel art.
Aspect Ratio Lock and Why It Matters
An aspect ratio is the proportional relationship between width and height (e.g. 16:9, 4:3, 1:1). Resizing without locking the ratio stretches or squishes the image. The aspect ratio lock calculates the missing dimension automatically: if your original is 1600×900 and you enter a width of 800, the height becomes 450 — maintaining the 16:9 ratio perfectly.
Social Media Image Size Cheatsheet
Quick reference for common platforms: Instagram — feed post 1080×1080 (square), story 1080×1920, landscape 1080×566. Twitter/X — post image 1200×675, header 1500×500, profile 400×400. Facebook — cover 820×312, shared image 1200×630. LinkedIn — post image 1200×627, banner 1584×396. YouTube — thumbnail 1280×720.
When to Use Percentage Scaling Instead of Fixed Pixels
Percentage scaling is useful when you want to reduce all images by the same relative amount without knowing exact output dimensions. Scale to 50% for quick thumbnail generation, or 75% to cut file size while preserving proportions. It is particularly handy for batch operations where every input image has different dimensions but you want each output halved.