3 AI tools in one place
0 € Cost, forever
0 Files uploaded to servers
The toolkit

Three tools. One tab. Zero cost.

Everything you need for quick image and video work, without handing your files to someone else's server.

AI Background Remover

Powered by the BRIA RMBG-1.4 model — the same quality you'd get from paid services, running entirely in your browser at no cost.

  • Full-resolution output, no downscale
  • PNG, WebP or JPEG output
  • Transparent background preserved
  • No limits on file count or size
Try it free →

Image Compressor & Converter

Set a target file size in KB and let Free Auto Captions AI do the maths. Handles batch jobs and converts between formats in one go.

  • Target file size control (any KB)
  • Convert to JPEG, PNG, WebP, SVG
  • Drop multiple images at once
  • Download all with one click
Try it free →

Auto Caption Generator

OpenAI's Whisper model transcribes your video or audio locally, produces time-stamped captions you can edit, and exports an SRT file.

  • Powered by OpenAI Whisper
  • Supports MP4, MOV, MP3, WAV & more
  • Editable captions in the browser
  • Download as .SRT subtitle file
Try it free →
Why choose Free Auto Captions AI

Different by design

Most free tools either watermark your work, cap your usage, or send your images to a cloud server. Free Auto Captions AI does none of that.

✅ Free Auto Captions AI

🔒Your files never leave your device — all AI runs in-browser
∞Unlimited images and files — no daily quotas
💧No watermarks ever — download clean outputs
👤No account required — open and use immediately
💰Completely free — no hidden credits or subscriptions
📦Three tools in one tab — no juggling multiple sites

❌ Typical free tools

☁️Upload your images to someone else's server
🔢3–5 free credits per day, then pay
💧Watermark on free outputs
📧Sign-up wall before you can use anything
💳Free plan locks full-resolution behind a paywall
🔀Separate sites for each task

Privacy isn't a selling point here — it's just how it works.

Free Auto Captions AI doesn't have a server-side component for image or audio processing. The AI models run entirely inside your browser using WebAssembly and the HuggingFace Transformers.js library. This means your photos, videos, and audio files literally cannot be sent anywhere — there's no endpoint to send them to.

How it works

Ready in three steps

🌐
Step 1

Open the app

No account, no install. Just click "Open App" above and you're in.

⏬
Step 2

First-run model download

The AI models download to your browser cache once (~170 MB for BG removal, ~75 MB for captions). Every visit after this is instant.

⚡
Step 3

Drop and process

Drag your image or video in and get your result. That's it.

From the blog

Guides & tips

Practical articles on image optimisation, captioning workflows, and making the most of browser-based AI tools.

Background Removal

The Best Free Background Removers in 2026 — No Sign-Up, No Upload

Paid tools like remove.bg charge per image and upload your files to a server. Here's what the browser-based alternatives actually look like.

Read the guide → Captions

How to Add Captions to Any Video for Free — Without Uploading It

Whisper-based tools now run directly in the browser, which means you can get near-perfect captions without a subscription or a server involved.

Read the guide → Image Optimisation

How to Compress Images for the Web Without Losing Quality

WebP vs JPEG vs PNG — when to use each format, and how to hit a specific file size target without turning your photo into a blurry mess.

Read the guide →
Questions

Frequently asked

Everything you'd want to know before trusting a tool with your images.

Free Auto Captions AI is a free, browser-based web app with three AI-powered tools: an image background remover, an image compressor and format converter, and an auto caption generator for video and audio. Everything runs inside your browser — no files are sent to a server.
No. Processing happens entirely on your device using browser-based AI (WebAssembly + HuggingFace Transformers.js). Your files literally cannot be sent anywhere because there is no server-side processing endpoint.
Yes — completely free, no credits, no watermarks, no daily limits, no account. Use it as many times as you want.
The AI models need to download to your browser cache the first time you use each tool (~170 MB for background removal, ~75 MB for captions). This only happens once. Every visit after that loads from your local cache and is near-instant.
Free Auto Captions AI uses BRIA's RMBG-1.4 model, a state-of-the-art image matting model trained on a large dataset of images. It performs well on portraits, product photos, and objects with clear edges. For very complex hair or transparent objects, results may vary.
Free Auto Captions AI uses OpenAI Whisper base, which supports transcription for 99 languages. Accuracy is highest for English, Spanish, French, German, Japanese, and other widely-spoken languages. It auto-detects the language of your file.
Yes — the image compressor and converter supports batch processing. Drop as many images as you want and download them all at once. The background remover currently processes one image at a time.
Ready?

Your images. Your device. Your rules.

No account, no upload, no catch. Just open it and use it.

🚀 Launch Free Auto Captions AI