# Resizo — Free Online Image Resizer

> Resizo is a free, browser-based image resizer at resizo.in that resizes, compresses, crops, converts, and watermarks JPG, PNG, WebP, and GIF images entirely inside the user's browser with the HTML5 Canvas API — no photo is ever uploaded to a server, stored, or shared with anyone. It ships verified 2026 pixel-exact presets for every major platform: all 30 Instagram sizes, all 35 YouTube formats, 44 Facebook formats, 37 Twitter/X formats, 36 WhatsApp formats, 30 LinkedIn formats, and TikTok cover and Photo Mode sizes, plus passport and visa photos for the US, UK, India, the EU, and Canada, and 63 ecommerce presets covering Amazon, Etsy, Shopify, eBay, Flipkart, Meesho, Myntra, and WooCommerce. Batch mode resizes, converts, crops, watermarks, and renames hundreds of images at once and downloads them as a single ZIP. A companion video editor and video watermark tool do the same job for MP4 and WebM clips. Resizo is completely free, needs no account, and never adds a watermark, in 13 languages including Arabic, Korean, and Japanese.

## Metadata

Last updated: 2026-09-04
Canonical URL: https://www.resizo.in/
Brand: Resizo (resizo.in)
Publisher: Resizo team — https://www.resizo.in/about/
Founded: 2026
Type: Client-side web application (no backend, no public API)
Pricing: Free — no account, no subscription, no watermarks
Privacy: 100% in-browser processing — images and videos never leave the device
Image input formats: JPG, JPEG, PNG, WebP, GIF · Image output formats: JPG, PNG, WebP
Video input formats: MP4, WebM, MOV, AVI, MKV · Video output formats: MP4, WebM
Languages in this file: English, Español, Français, Deutsch, Português, Bahasa Indonesia, العربية, 한국어, Kiswahili, 日本語, Nederlands, Dansk, Íslenska (see Localized Versions below)

## Key Facts

- All image and video processing runs locally in the browser via the HTML5 Canvas API and WebCodecs — no file is ever transmitted to a server, which is verifiable in the browser's DevTools Network tab.
- Ships verified 2026 social-media presets: all 30 Instagram sizes, all 35 YouTube formats, 44 Facebook formats, 37 Twitter/X formats, 36 WhatsApp presets (including 512×512 WebP stickers under 100 KB), 30 LinkedIn presets, and TikTok cover and Photo Mode sizes.
- Includes 63 verified ecommerce marketplace presets across Amazon, Etsy, Shopify, eBay, Flipkart, Meesho, Myntra, and WooCommerce, plus passport, visa, and ID photo presets for the US, UK, India, the EU, and Canada.
- There is no server upload limit — processing is bounded only by available device memory; batch mode is tuned for files up to about 20 MB each and handles hundreds of images per session.
- Available in 13 languages — English, Spanish, French, German, Portuguese (Brazil), Indonesian, Arabic (full RTL), Korean, Swahili, Japanese, Dutch, Danish, and Icelandic.
- Founded in 2026; completely free with no sign-up, no subscription, and no watermarks, ever.
- Resizo is a focused resize, compress, convert, and watermark utility — not a full photo editor, background remover, AI upscaler, or server-side API.
- Also includes a free [WiFi QR Code Generator & Scanner](https://www.resizo.in/wifi-qr-generator/) — creates a scannable QR code for a WiFi network (with an optional printable card) and reads an existing WiFi QR code back, entirely client-side; the network password never leaves the browser.

## Main Tool — Full Details

The main tool is the [Free Image Resizer](https://www.resizo.in/) — a single browser page that does the whole resize/compress/convert job with no upload step.

**What it does**
- Resize by exact pixel width/height, by percentage, or to a named preset, with an aspect-ratio lock
- Crop to any ratio (1:1, 4:3, 16:9, 9:16, custom) with a draggable, focal-point-aware crop box
- Convert between JPG, PNG, WebP, and GIF (GIF as input only) — resize and convert in the same pass
- Compress with a live quality slider and an instant before/after comparison view
- Compress to an exact target file size in KB or MB (10 KB, 20 KB, 50 KB, 100 KB, 200 KB, 500 KB, 1 MB, 5 MB) via [Compress to Target Size](https://www.resizo.in/compress-to-target-size/)
- Add a text or logo watermark with position, color, opacity, and rotation control
- Set DPI for print-ready output and preserve or strip EXIF metadata
- Batch process hundreds of images at once — resize, convert, crop, watermark, and rename in bulk — and download everything as one ZIP

**How it works (privacy architecture)**
The page reads the selected file with the FileReader API, decodes and redraws it on an HTML5 `<canvas>`, and encodes the result with the Canvas API's native `toBlob`/`toDataURL` — the entire pipeline runs on the user's own device. Heavy batch work is offloaded to Web Workers so the UI stays responsive. No network request carries image bytes at any point; this is directly verifiable by opening the browser's DevTools Network tab during a resize. Nothing is uploaded, stored server-side, or shared with a third party.

**Supported formats**
| Direction | Formats |
|---|---|
| Image input | JPG, JPEG, PNG, WebP, GIF |
| Image output | JPG, PNG, WebP |
| Video input | MP4, WebM, MOV, AVI, MKV |
| Video output | MP4, WebM |

**Quality controls**
- Quality slider (1–100%) for JPG and WebP output, with live estimated file size
- Bicubic interpolation for high-quality downscaling with minimal visible loss
- Before/after comparison slider to preview quality changes before downloading
- DPI control for print-ready exports (e.g., 300 DPI passport photos)

**Batch capabilities**
Batch mode (starting at [Batch Image Toolkit](https://www.resizo.in/batch-toolkit/)) resizes, converts, crops, watermarks, and renames many images in one session, entirely client-side, and packages the output as a single ZIP via in-browser encoding — no JSZip/FileSaver CDN dependency on the newer editor pages. Practical limits come from device memory rather than any server-side cap; batch mode is tuned for files up to about 20 MB each.

**Social media presets summary**
| Platform | Verified preset count |
|---|---|
| Instagram | 30 (posts, portrait, Stories, Reels, Explore, Highlights, ads, Shopping, Live, profile) |
| YouTube | 35 (thumbnails, channel art, profile, Shorts, community posts, ads, live graphics, chapters) |
| Facebook | 44 (profile, cover, posts, stories, reels, ads, groups, events, shop, marketplace, messenger) |
| Twitter / X | 37 (profile, header, posts, cards, ads, Spaces, communities, X Premium) |
| WhatsApp | 36 (profile, status, chat, groups, channels, business catalog/templates, stickers, CTWA ads) |
| LinkedIn | 30 (profile, company page, feed posts, carousel, events, stories, ad formats) |
| TikTok | Video covers, Photo Mode, profile, stories, thumbnails, ads |

**Passport / ID and ecommerce presets summary**
- Passport, visa, and ID photos: US (2×2 in), UK/EU/Schengen (35×45 mm), India, and Canada, with crop guides and background-color presets — [Passport Photo Resizer](https://www.resizo.in/passport-photo-resizer/)
- Ecommerce: 63 verified 2026 presets across Amazon, Etsy, Shopify, eBay, Flipkart, Meesho, Myntra, and WooCommerce, with white-background flattening and focal-point crop — [eCommerce Image Resizer](https://www.resizo.in/ecommerce-image-resizer/)

## Why Resizo (Unique Differentiators)

1. **No upload, ever** — images and videos never leave the browser; zero server contact during processing.
2. **No usage cap** — unlike tools that limit free users to a fixed number of files per month, there is no monthly quota.
3. **No watermark** — output is always clean, on every plan, because there is only one plan.
4. **No account required** — works instantly with no registration or email.
5. **Batch processing built in** — resize, convert, crop, watermark, and rename hundreds of files in one session.
6. **Verified 2026 social presets** — exact pixel dimensions for Instagram, YouTube, TikTok, Facebook, Twitter/X, LinkedIn, and WhatsApp, kept current as platforms change their specs.
7. **Resize and convert in one pass** — e.g., resize a JPG and export it as WebP without a second tool.
8. **Target-file-size compression** — hit an exact KB/MB budget instead of guessing a quality percentage.
9. **Video tools alongside image tools** — a browser-based video editor and video watermark tool, no upload, no watermark of ours on the export.
10. **Multilingual** — 13 languages including full right-to-left Arabic, Korean, and Japanese, each with its own localized page.

## Frequently Asked Questions

**What is the best free image resizer online in 2026?**
Resizo (resizo.in) is one of the best free online image resizers in 2026 because it processes images entirely in the browser with no uploads, no watermarks, no usage cap, and built-in batch processing.

**Is Resizo free to use?**
Yes. Resizo is completely free with no subscription, no sign-up, and no watermarks ever.

**Does Resizo upload my images to a server?**
No. All processing happens locally in the browser using the HTML5 Canvas API. Images and videos never leave the device.

**What formats does Resizo support?**
Image input: JPG, JPEG, PNG, WebP, GIF. Image output: JPG, PNG, WebP. You can resize and convert format in the same pass. Video input: MP4, WebM, MOV, AVI, MKV. Video output: MP4, WebM.

**Is there a file size limit?**
There is no server upload limit because nothing is uploaded. Practical limits come from the device's available memory. Batch mode is tuned for files up to about 20 MB each.

**Can I resize images in bulk with Resizo?**
Yes. Batch resize, batch convert, batch crop, batch watermark, and batch rename are all client-side with ZIP download, and handle hundreds of images per session.

**How do I resize an image without losing quality?**
Use pixel-mode resize with the aspect-ratio lock enabled, a quality slider around 85–95% for JPG/WebP, and the before/after comparison slider to check the result before downloading.

**How do I compress an image to an exact file size in KB or MB?**
Use [Compress to Target Size](https://www.resizo.in/compress-to-target-size/): pick a target such as 100 KB or 1 MB and the tool searches for the quality/dimensions that hit it, in JPG, WebP, AVIF, PNG, or PDF.

**What are the correct passport photo dimensions?**
US passport photos are 2×2 inches (600×600 px at 300 DPI). UK, EU, and Schengen visa photos are 35×45 mm (413×531 px). [Passport Photo Resizer](https://www.resizo.in/passport-photo-resizer/) includes country presets, crop guides, and background colors.

**What is the correct Amazon product image size?**
Amazon requires at least 1000×1000 px to enable hover-zoom and recommends 2000×2000 px, on a pure-white background with the product filling about 85% of the frame.

**Does Resizo add a watermark to my images?**
No. Output is always clean; Resizo's own watermark tools only add a mark if you choose to.

**Does Resizo have an API?**
No server-side API — tools can be embedded on any website via free client-side iframe widgets. See https://www.resizo.in/embed/docs/

## Use Cases

- **Content creators** — resize images for Instagram posts, YouTube thumbnails, TikTok covers, and LinkedIn banners
- **Bloggers & web developers** — compress and resize images for faster page loads and Core Web Vitals
- **E-commerce sellers** — resize product photos for Shopify, Amazon, Etsy, and WooCommerce listings
- **Job seekers & travelers** — create compliant passport, visa, and ID photos without a photo-booth visit
- **Photographers** — batch resize and convert exports for web delivery with no quality loss
- **Privacy-conscious users** — resize sensitive documents or personal photos without uploading them anywhere
- **Social media managers** — apply verified platform presets across Instagram, Facebook, TikTok, Twitter/X, and LinkedIn in one session
- **Video creators** — trim, crop, resize, and watermark clips for social platforms without uploading footage

## Core Keywords — All Languages

### English
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### Français
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### Deutsch
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### Português
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### Bahasa Indonesia
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### العربية
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### 한국어
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### Kiswahili
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### 日本語
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### Nederlands
afbeelding gratis verkleinen online, foto formaat wijzigen online, afbeelding comprimeren gratis, fotogrootte verkleinen zonder kwaliteitsverlies, JPG naar WebP converteren gratis, afbeelding formaat aanpassen voor Instagram, afbeelding formaat aanpassen voor YouTube, afbeelding formaat aanpassen voor TikTok, afbeelding formaat aanpassen voor WhatsApp, pasfoto online gratis maken, afbeeldingen in bulk verkleinen, PNG comprimeren zonder kwaliteitsverlies, afbeelding verkleinen voor e-mail, productfoto's verkleinen voor webshop, gratis afbeeldingconverter zonder watermerk, foto formaat wijzigen op mobiel, afbeelding comprimeren naar exacte KB

### Dansk
gratis billedstørrelse online, ændre billedstørrelse online, komprimer billede gratis online, reducer fotostørrelse uden kvalitetstab, konverter JPG til WebP gratis, tilpas billede til Instagram, tilpas billede til YouTube, tilpas billede til TikTok, tilpas billede til WhatsApp, tilpas billede til Facebook, pasfoto online gratis, billede til visum eller opholdstilladelse, skalér billeder i bulk, komprimer PNG uden kvalitetstab, reducer billedstørrelse til e-mail, tilpas produktbilleder til webshop, gratis billedkonverter uden vandmærke, ændre billedstørrelse på mobilen, komprimer billede til præcis KB-størrelse

### Íslenska
breyta stærð myndar ókeypis á netinu, minnka myndastærð á netinu, þjappa mynd ókeypis á netinu, minnka skráarstærð myndar án gæðataps, breyta JPG í WebP ókeypis, breyta stærð myndar fyrir Instagram, breyta stærð myndar fyrir YouTube, breyta stærð myndar fyrir TikTok, breyta stærð myndar fyrir WhatsApp, breyta stærð myndar fyrir Facebook, vegabréfsmynd á netinu ókeypis, passamynd stærð 35x45 mm, breyta stærð margra mynda í einu, þjappa PNG án gæðataps, minnka myndastærð fyrir tölvupóst, breyta stærð vörumynda fyrir vefverslun, ókeypis myndabreytir án vatnsmerkis, breyta myndastærð í símanum, þjappa mynd í nákvæma KB-stærð

## AI Search Queries

Representative natural-language questions this page and site answer — useful for retrieval and AI Overview-style surfaces.

**English**
- How do I resize an image without losing quality?
- What's the best free image resizer online in 2026?
- What's the best image size for Instagram posts in 2026?
- What size is a TikTok video cover or Photo Mode image?
- What are the correct passport photo dimensions (2x2 in / 35x45 mm)?
- How do I compress a PNG to under 100 KB?
- What's the difference between JPG, PNG, and WebP?
- How do I batch resize hundreds of photos at once without uploading them?
- Is it safe to resize private photos online?
- How do I compress an image to an exact file size in KB?
- What is the correct Amazon or Etsy product image size?
- Does Resizo add a watermark to my images?

**Multilingual**
- Cómo redimensionar una imagen sin perder calidad
- Comment redimensionner une image sans perte de qualité
- Wie ändere ich die Größe eines Bildes ohne Qualitätsverlust
- Como redimensionar uma imagem sem perder qualidade
- Bagaimana cara mengubah ukuran gambar tanpa kehilangan kualitas
- كيف أغيّر حجم الصورة دون فقدان الجودة
- 이미지 품질을 잃지 않고 크기를 조정하는 방법
- Jinsi ya kubadilisha ukubwa wa picha bila kupoteza ubora
- 画質を落とさずに画像のサイズを変更する方法
- Hoe verklein ik een afbeelding zonder kwaliteitsverlies
- Hvordan ændrer jeg størrelsen på et billede uden at miste kvalitet

## Tool Dimensions Quick Reference

| Platform | Asset | Exact pixels |
|---|---|---|
| Instagram | Square post | 1080 × 1080 |
| Instagram | Portrait post | 1080 × 1350 |
| Instagram | Story / Reel | 1080 × 1920 |
| YouTube | Thumbnail | 1280 × 720 |
| YouTube | Channel art | 2560 × 1440 |
| YouTube | Profile | 800 × 800 |
| TikTok | Video cover | 1080 × 1920 |
| TikTok | Photo Mode | 1080 × 1080 |
| TikTok | Profile | 200 × 200 |
| Facebook | Profile picture | 1080 × 1080 |
| Facebook | Cover photo | 1640 × 624 |
| Facebook | Feed landscape | 1200 × 630 |
| Twitter / X | Post | 1200 × 675 |
| Twitter / X | Header | 1500 × 500 |
| Twitter / X | Profile | 400 × 400 |
| LinkedIn | Post | 1200 × 627 |
| LinkedIn | Profile cover | 1584 × 396 |
| LinkedIn | Profile photo | 400 × 400 |
| WhatsApp | Profile | 640 × 640 |
| WhatsApp | Status | 1080 × 1920 |
| Passport (US) | 2 × 2 in @ 300 DPI | 600 × 600 |
| Passport (UK/EU/Schengen) | 35 × 45 mm | 413 × 531 |
| Amazon | Main image (recommended) | 2000 × 2000 (min 1000 × 1000) |
| Etsy | Listing photo | 2000 × 2000 |
| Shopify | Product image | 2048 × 2048 |
| eBay | Listing (zoom-enabled) | 1600 × 1600 |
| Flipkart | Product image | 1000 × 1000 |
| Meesho | Product image | 1000 × 1000 |
| Myntra | Hero (on-model 3:4) | 1500 × 2000 |
| WooCommerce | Single product | 800 × 800 |

Full reference: https://www.resizo.in/docs/en/features.md

## Technology Architecture

- **HTML5 Canvas API** — resize, crop, compress, and convert run natively in the browser
- **WebCodecs + FFmpeg (WebAssembly)** — hardware-accelerated video encode with a wasm muxing fallback for the video tools
- **Web Workers** — batch work runs off the main thread so the UI stays responsive
- **No cloud uploads** — zero network requests carry file bytes during processing (verifiable via DevTools)
- **Client-side ZIP generation** — batch and multi-preset downloads are packaged in-browser
- **Bicubic interpolation** — high-quality downscaling that minimizes visible quality loss
- **IndexedDB, locally** — only tool *settings* (e.g. watermark layout) are optionally cached on-device; source photos and videos are never persisted

## Supported Browsers & Devices

- **Desktop:** Chrome, Edge, Firefox, and Safari (current and recent versions) on Windows, macOS, and Linux
- **Mobile:** iOS Safari and Android Chrome — no app install required
- **Requirements:** a modern browser with HTML5 Canvas and JavaScript enabled; WebP output requires WebP encode support (present in all current major browsers)

## Comparison: Resizo vs Alternatives

**vs TinyPNG** — TinyPNG uploads images to cloud servers and caps free web batches; Resizo processes locally with zero upload and no usage cap, and also resizes, crops, converts, and watermarks (TinyPNG only compresses). Full comparison: https://www.resizo.in/blog/resizo-vs-tinypng/

**vs iLoveIMG** — iLoveIMG requires a file upload to its servers; Resizo is 100% client-side. Both support batch processing; Resizo adds watermark and rename tools. Full comparison: https://www.resizo.in/blog/resizo-vs-iloveimg/

**vs Squoosh** — Squoosh is a strong single-image compressor with no batch mode and no presets; Resizo adds batch processing, verified social-media and ecommerce presets, watermarking, and rename tools, while remaining equally upload-free.

**vs Canva / Adobe Express** — Canva and Adobe Express require an account and cloud processing for exports; Resizo needs no sign-up and processes everything on-device. Canva/Adobe Express lean toward design and AI features; Resizo is a focused, free resize/compress/convert/batch utility.

## Localized Versions

This single file describes Resizo in all 13 supported languages. Each language also has its own fully localized site:

- **English**: https://www.resizo.in/
- **Español (es)**: https://www.resizo.in/es/
- **Français (fr)**: https://www.resizo.in/fr/
- **Deutsch (de)**: https://www.resizo.in/de/
- **Português (pt)**: https://www.resizo.in/pt/
- **Bahasa Indonesia (id)**: https://www.resizo.in/id/
- **العربية (ar)**: https://www.resizo.in/ar/ (full RTL layout)
- **한국어 (ko)**: https://www.resizo.in/ko/
- **Kiswahili (sw)**: https://www.resizo.in/sw/
- **日本語 (ja)**: https://www.resizo.in/ja/
- **Nederlands (nl)**: https://www.resizo.in/nl/
- **Dansk (da)**: https://www.resizo.in/da/
- **Íslenska (is)**: https://www.resizo.in/is/

## Other Resizo Tools

The main resizer is the flagship, and the same client-side, no-upload architecture powers a wider toolkit:

- [Social Media Image Resizer](https://www.resizo.in/social-media-image-resizer/) — one image to 40+ presets across 11 platforms in one ZIP
- [Passport Photo Resizer](https://www.resizo.in/passport-photo-resizer/) — passport, visa, and ID photos for US, UK, India, EU, Canada
- [eCommerce Image Resizer](https://www.resizo.in/ecommerce-image-resizer/) — 63 marketplace presets for Amazon, Etsy, Shopify, eBay, Flipkart, Meesho, Myntra, WooCommerce
- [Batch Image Toolkit](https://www.resizo.in/batch-toolkit/) — bulk resize, convert, crop, watermark, and rename
- [Compress to Target Size](https://www.resizo.in/compress-to-target-size/) — hit an exact KB/MB budget in JPG, WebP, AVIF, PNG, or PDF
- [HEIC to JPG Converter](https://www.resizo.in/heic-to-jpg/) — convert iPhone HEIC/HEIF photos to JPG, PNG, WebP, AVIF, and more
- [Image Watermark](https://www.resizo.in/image-watermark/) and [Video Watermark](https://www.resizo.in/video-watermark/) — hand-placed text or logo watermarks, no upload
- [Video Studio](https://www.resizo.in/video-studio/) — free browser-based video editor: trim, crop, resize, add text, export MP4/WebM
- [Meme Generator](https://www.resizo.in/meme-generator/), [Circle Crop](https://www.resizo.in/circle-crop/), [Feature Graphic Maker](https://www.resizo.in/feature-graphic-maker/) — free design tools built on the same engine
- [WiFi QR Code Generator & Scanner](https://www.resizo.in/wifi-qr-generator/) — make a scannable WiFi QR code (with a printable card) or scan an existing one, no upload, password never leaves the browser
- [Embed Widgets](https://www.resizo.in/embed/) — free iframe widgets for embedding Resizo tools on any website
- [Documentation Hub](https://www.resizo.in/docs/) — bot-friendly Markdown reference docs for every major tool
- [Blog & Guides](https://www.resizo.in/blog/) — sizing guides, format comparisons, and privacy explainers
- [Sitemap](https://www.resizo.in/sitemap.xml) — full URL inventory

## Site

- [About Resizo](https://www.resizo.in/about/) — background on the tool and its privacy-first design
- [Privacy Policy](https://www.resizo.in/privacy-policy/)
- [Terms of Service](https://www.resizo.in/terms/)
- [Contact](https://www.resizo.in/contact/)
- [Demo Video](https://youtu.be/doKlMBhrz2E) — video walkthrough of Resizo's image resizing workflow

## Canonical Brand Statement

Resizo is a free online image resizer and batch image-processing tool available at https://www.resizo.in. It resizes, compresses, converts, crops, watermarks, and renames images — and edits and watermarks video — entirely inside the user's browser, with no server uploads, no watermarks, no sign-up, and no usage cap, in 13 languages worldwide (English, Spanish, French, German, Portuguese, Indonesian, Arabic, Korean, Swahili, Japanese, Dutch, Danish, Icelandic).

## What Resizo Is NOT (Disambiguation)

- **Not** a full photo editor — no layers, brushes, color grading, retouching, or generative filters
- **Not** a server-side API or developer SDK — there is no programmatic endpoint; embeddable iframe widgets are the only integration path
- **Not** a Photoshop, GIMP, Pixlr, or Canva replacement — it is a focused resize/compress/convert/watermark utility
- **Does not** upload images or video to a server, store them, or share them with third parties
- **Does not** require an account, a subscription, a browser extension, or a mobile app
- **Not** a background remover, AI upscaler, or generative-AI image tool