Free Online Image Tools
Most online image tools quietly upload your photos to a server before doing anything with them. These don't. Every tool in this collection processes images locally with your browser's Canvas API, so personal photos, client work and screenshots never leave your device — and there is no queue, watermark or daily limit.
The multi-layer Image Editor handles text and image layers, adjustments and blend modes. For quick fixes, the Image Resizer sets exact pixel sizes or percentages in batches, the Image Cropper crops to social-media aspect ratios, and Flip & Rotate straightens or mirrors many images at once. The Image Compressor shrinks JPEG, PNG and WebP files with a before/after comparison, and the Format Converter switches between PNG, JPEG and WebP. iPhone photos can be turned into JPG with HEIC to JPG, and Image to PDF combines several pictures into a single PDF document. You can also protect work with the Image Watermark tool, rasterize vector art with SVG to PNG, build a full favicon set from one image, strip GPS and camera data with the EXIF Viewer & Remover, and work out dimensions with the Aspect Ratio Calculator.
All tools work in any modern browser on desktop or mobile, with no account and nothing to install.
All Image Tools (13)
Image Editor
Multi-layer online photo editor.
Open tool →Image Resizer
Change image dimensions by pixels or percent.
Open tool →Image Cropper
Crop, rotate and flip images.
Open tool →Image Compressor
Reduce image file size in KB.
Open tool →HEIC to JPG
Convert iPhone HEIC photos to JPG or PNG.
Open tool →Image to PDF
Combine JPG, PNG and WebP images into a PDF.
Open tool →Image Format Converter
Convert PNG, JPEG and WebP.
Open tool →Image Flip & Rotate
Batch rotate and mirror photos.
Open tool →Image Watermark
Add text watermarks to photos.
Open tool →SVG to PNG / JPEG
Rasterize SVG files.
Open tool →Favicon Generator
Create favicons from any image.
Open tool →EXIF Viewer & Remover
View and strip photo metadata.
Open tool →Aspect Ratio Calculator
Find ratios and resize dimensions.
Open tool →Frequently Asked Questions
Are my images uploaded to a server?↓
No. Every NJHTools image tool processes files locally in your browser using the Canvas API. Images are never uploaded, stored or shared.
Which image formats are supported?↓
The tools read common web formats including JPEG, PNG and WebP (plus GIF and SVG in several tools) and export to PNG, JPEG or WebP. The SVG to PNG tool rasterizes SVG at 1x, 2x or 4x.
How do I reduce an image's file size without losing much quality?↓
Use the Image Compressor: lower the quality slider gradually and compare the before/after preview, or convert to WebP with the Image Format Converter, which is usually smaller than JPEG or PNG at similar quality.
How can I remove location data from a photo?↓
Open the EXIF Viewer & Remover, check which metadata (including GPS coordinates) is embedded, then remove all metadata with one click before you share the photo.
Do the image tools add a watermark?↓
No. Output images are never watermarked — the only watermark is the one you add yourself with the Image Watermark tool.
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