HomeImageGuides

📖 Buying guide

Best Free Online Image Tools: The Complete Guide to Converting, Compressing and Editing Photos

A complete guide to converting, compressing, cropping and editing photos for free in your browser — JPG, PNG, WebP, HEIC and more. 42 tools compared.

Every image tool below runs entirely inside your browser tab — no upload, no account, no watermark, and no daily conversion limit. That’s true even for the AI-powered tools (background removal, upscaling, colorization), which run a real machine-learning model directly on your device rather than sending your photo to a cloud API. This guide organizes all 42 image tools by what you’re actually trying to do.

Photos are among the most personal files most people work with — vacation photos, ID documents, screenshots of private conversations — so the privacy angle here matters as much as the convenience. Every one of these tools was built on the same core principle: the actual pixel processing happens using your browser’s own Canvas API or a downloaded-once AI model, never a remote server, so there’s genuinely nothing to upload in the first place.

Converting between image formats

This is the most-searched category of image tool, and this site covers the full conversion matrix between the formats people actually run into:

If you’re not sure which target format to pick: JPG is smallest for photos with no transparency, PNG is lossless and supports transparency, and WebP usually beats both at the same visual quality — but check what the destination (a website, an app, a print shop) actually accepts before converting. AVIF is newer still and typically compresses even smaller than WebP at equivalent quality, though it’s worth double-checking that your target platform actually supports it before relying on it exclusively.

Compressing, resizing and upscaling

File size matters for uploads, emails, and page-load speed, while pixel dimensions matter for display quality — these three tools cover both directions, shrinking a file down or intelligently enlarging it back up.

Cropping, rotating and basic edits

The everyday fixes — a sideways photo, an off-center crop, a mirrored selfie — are handled by this group without needing a full photo editor.

Color, effects and AI transformations

Privacy and metadata

Text extraction, drawing and web-asset tools

Which tool should I use?

I want to…Use this tool
Convert a photo between JPG, PNG, WebP or AVIFSee the format-conversion matrix above
Convert an iPhone HEIC photoHEIC to JPG or HEIC to PNG
Shrink a photo’s file sizeCompress Images
Change a photo’s pixel dimensionsResize Images
Enlarge a small/blurry photo with AIAI Image Upscaler
Remove the background from a photoRemove Background from Image
Add plausible color to a black-and-white photoAI Photo Colorizer
Crop a photo for a profile pictureCrop Image into a Circle
Turn a photo into a pencil sketchConvert Photo to Pencil Sketch
Blur a face or license plate for privacyBlur Part of an Image
Check or remove a photo’s hidden GPS/metadataEXIF Metadata Viewer / Remove EXIF Data
Read text out of a screenshot or scanned photoExtract Text from Image (OCR)
Add a text watermark to protect a photoAdd Watermark to Photos
Split a photo into a 3x3 Instagram gridSplit Image for Instagram Grid
Build a favicon set for a websiteFavicon Generator
Draw a signature to embed elsewhereSignature Generator

Every step above happens in your browser, on your own device — no photo you touch here is ever uploaded. With 42 tools spanning simple format conversion through genuine AI-powered editing, most everyday photo tasks are covered without ever needing to install a desktop editor or sign up for a cloud photo service.

The tools in this guide, in action

Screenshot of the Convert JPG to PNG tool with sysfenix-sample.jpg (48 KB) loaded
Convert JPG to PNG mid-process: sysfenix-sample.jpg (48 KB) loaded.
Screenshot of the Convert PNG to JPG tool with sysfenix-sample.png (466 KB) loaded, JPG quality (1–100) set to 90, Background for transparent areas set to White (recommended)
Convert PNG to JPG mid-process: sysfenix-sample.png (466 KB) loaded, JPG quality (1–100) set to 90, Background for transparent areas set to White (recommended).

Frequently asked questions

Do any of these image tools upload my photos to a server?

No. Every image tool here runs entirely in your own browser tab, using the browser's native canvas and image-decoding APIs (and, for two AI tools, a machine-learning model downloaded once and run on-device). Your photos are never uploaded, stored, or seen by anyone else.

I just need a quick format conversion — which tool do I pick?

Match the tool name to your starting and target format, e.g. HEIC to JPG if your iPhone saved a .heic photo you need as a normal JPG. This site deliberately has a separate page per conversion pair (rather than one universal converter) so each page can rank for its own specific search — but functionally they're all fast, one-click conversions.

What's the difference between Compress Image and Resize Image?

Compress Image re-encodes a photo at a lower quality setting to shrink its file size while keeping the same dimensions (and guarantees it never ends up bigger than the original). Resize Image changes the actual pixel dimensions (e.g. shrinking a 4000px-wide photo down to 1080px) — the two are often used together.

Are the AI tools (Remove Background, AI Image Upscaler, AI Photo Colorizer) actually running a real AI model in my browser?

Yes. These use real, openly-licensed machine-learning models (for background segmentation, super-resolution, and colorization respectively) that download once to your browser and then run locally via WebAssembly — no cloud API call, no per-image cost, and no image ever leaves your device.

How do I remove personal/location data from a photo before sharing it?

Use Remove EXIF Data — most phone cameras embed GPS coordinates and device details invisibly inside a photo file. If you want to see exactly what's embedded before deciding, use EXIF Metadata Viewer first.

Every tool covered in this guide