SnapSlim has always been built around one simple promise: powerful image tools that work entirely inside your browser, with zero privacy risk. Today, we’re proud to introduce three major new features that make SnapSlim one of the most versatile free image tools available — no installation, no account, no server upload needed.
Feature 1: Custom Pixel Resize — Set Exact Width × Height
Until now, SnapSlim’s resize feature only allowed you to control the width of an image. The height would scale automatically to preserve the original ratio. That’s great for most situations, but what if you need a banner that’s exactly 300 × 250px, or a social media image at a precise 1080 × 1080px?
The new Width × Height resize tool gives you full control.
How It Works
Open the ✂️ Image Compress tab, upload your photo, and find the “가로 × 세로 (px) 직접 지정” section. You’ll see two input boxes — one for width (W) and one for height (H).
- Width only → the tool resizes proportionally and preserves the original ratio (same as before)
- Width + Height both set → the image is resized to exactly those pixel dimensions using the Canvas API, directly in your browser
Aspect Ratio Lock 🔒
Don’t want to do the math yourself? Enable the ratio lock button (🔒 비율고정). The tool will remember your current width-to-height ratio, so changing one value automatically recalculates the other.
Handy Presets
We’ve built in 9 popular presets you can apply with a single click:
| Preset | Size |
|---|---|
| 배너 광고 | 300 × 250px |
| 카카오톡 | 1080 × 700px |
| 인스타그램 정사각형 | 1080 × 1080px |
| 인스타그램 세로 | 1080 × 1350px |
| 블로그 (가로 전용) | 1080px wide |
| FHD | 1920 × 1080px |
| 유튜브 썸네일 | 1280 × 720px |
| 트위터/X | 1200 × 675px |
| 카카오 채널 | 800 × 800px |
This is especially useful for content creators who need images at specific platform sizes every day.
Feature 2: Image Merge — Combine Multiple Photos into One
Do you ever need to stitch several photos together into a single image? Whether it’s a blog comparison shot, a product grid, or a social media collage, the new 🖼️ Image Merge tab in SnapSlim has you covered.
Getting Started
Click the “이미지 합치기” tab at the top of the tool. Drag and drop your images (or click to select), and they’ll appear as a numbered list. You can add images in any order — and reorder them any time using the ▲ / ▼ arrow buttons.
All merging happens 100% locally using the Canvas API. Your photos are never sent to any server.
Three Layout Modes
Choose how you want the images arranged:
| Layout | Description |
|---|---|
| ⬇️ 세로 나열 (Vertical) | Stack images top to bottom |
| ➡️ 가로 나열 (Horizontal) | Line images left to right |
| ⊞ 격자 (Grid) | Arrange in a 2, 3, or 4-column grid |
Customization Options
Once you’ve added your images, you can fine-tune the result:
- Gap (간격): Slide between 0px (no gap) to 80px spacing between images
- Background color (배경색): White, Black, or Transparent (exports as PNG)
- Max width (최대 가로폭): Rescale all images to a consistent width (e.g., 1080px) before merging
Preview Before You Save
Not sure how it’ll look? Click 👁️ 미리보기 to generate a preview inside the page. If you’re happy with it, click ⬇️ 합쳐서 저장 to download the final merged image.
Use Cases
- Blog posts: Before/after comparison, multi-step tutorials
- E-commerce: Product color variants, size comparisons
- Social media: Instagram grid layouts, story sequences
- Travel: Photo strips or panoramic mosaics
- Real estate: Interior room collages
Feature 3: Watermark Positioning — Place Text Anywhere on the Image
Watermarks are an essential tool for photographers and bloggers to protect their work. Previously, SnapSlim always placed the watermark in the bottom-right corner. Now you can place it wherever you want using a visual 3×3 grid selector.
How to Use It
Upload an image, then scroll to the “블로거 워터마크” section. Type your watermark text — and as soon as you do, a 3×3 position grid appears:
[좌상단] [상단중앙] [우상단]
[좌중앙] [ 정중앙 ] [우중앙]
[좌하단] [하단중앙] [우하단] ← defaultClick any cell in the grid to instantly change where the watermark will appear on your image. A small label below the grid confirms your current selection (e.g., ”📍 우상단”).
The tool also shows the currently selected position as a highlighted “T” marker in the grid, so there’s never any ambiguity.
Tip: Center placement works especially well for product images to make watermarks harder to crop out, while corner placements are more subtle for blog photos.
All Three Features: Same SnapSlim Promise
Every one of these new features follows the same core principle that makes SnapSlim unique:
✅ 100% client-side — your images never leave your device
✅ No account or registration required
✅ Free and unlimited — compress and process as many images as you like
✅ Works in any modern browser on desktop or mobile
Try It Now
All three features are live today at snapslim.site.
Simply open the page, drag in your images, and start exploring:
- Use the ✂️ 이미지 압축 tab for compression, resizing, and watermarking
- Switch to the 🖼️ 이미지 합치기 tab to combine multiple photos into one
No download. No sign-up. Just open and go.
SnapSlim — professional image tools for everyone, completely free.