My Tools

Browser-first online tools

Practical Online Tools

Convert files, edit media, format data and complete common web tasks directly in your browser.

WEBPJPG
Drop WEBP files hereor
Supported formatWEBPBatch processingUp to 100 filesYour files are privateProcessed in your browser
No upload

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JPG to WEBPConvert JPG files to WEBP locally in your browser.PNG to JPGConvert PNG files to JPG locally in your browser.WEBP to JPGConvert WEBP files to JPG locally in your browser.HEIC to JPGConvert HEIC files to JPG locally in your browser.Word CounterWord Counter directly in your browser with no account required.JSON FormatterJSON Formatter directly in your browser with no account required.Robots.txt GeneratorRobots.txt Generator directly in your browser with no account required.ZIP ExtractorZIP Extractor directly in your browser with no account required.

Everything in one place

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Save the busywork

Multi-step Workflows

Run common file tasks in one repeatable flow.

Explore workflows
Convert, Resize & Compress Images

Prepare a folder of images for the web in one pass.

JPG to WebP & Compress

Create lightweight WebP files ready to publish.

Clean & Format Text

Remove messy spacing and standardize text case.

Format & Validate JSON

Beautify JSON and catch syntax errors at once.

Private by default

How online file tools work

zer.ai uses browser technology to process supported files on your device. Your files do not need to wait in an upload queue, and no account is needed for core tools.

PrivateLocal processing when supportedFastNo server upload waitNo accountCore tools start immediately

Common questions

FAQ

Are my files uploaded?

Supported tools process files in your browser. Each tool page clearly states its processing method.

Is zer.ai free?

The core tools are free to use without an account.

Which browsers are supported?

We target current versions of Chrome, Edge, Firefox and Safari. Format support can vary.

Is there a file size limit?

Limits depend on browser memory and the selected tool. Each page shows its current limit.

Practical online tools that work in your browser

zer.ai brings focused tools for files, content and common web tasks into one browser-first workspace. Convert images and audio, clean and format text, generate SEO metadata, process subtitles and work with supported archive formats without installing desktop software. No account is needed for core tools.

Choose a focused tool or workflow

Open a specific tool when you already know the task, such as converting HEIC to JPG, changing WAV to MP3, formatting JSON or extracting a ZIP file. Use a workflow when several steps belong together, such as converting, resizing and compressing a batch of images.

Convert and prepare files for everyday use

Image tools help you change formats, resize photos, compress images and prepare files for websites or online services. Audio tools cover common format changes, trimming, merging and compression. Text, data and SEO tools are useful for formatting JSON, converting CSV or XML, checking text and preparing search metadata.

Subtitle and archive tools complete the common file workflow. Convert SRT or VTT captions, adjust subtitle timing, extract ZIP or 7Z files and create supported archives without moving between several unrelated websites.

Private browser processing

Supported tools process files locally in your browser. File compatibility and size limits vary by format and device, so each tool page explains its processing method and limitations. Keep an original copy of important files before processing.

Browse tools by task

Explore image, audio, archive, text, SEO and subtitle tools from the category pages. Related tools and reverse conversion links help you move between closely related search intents without losing the file task you started.

Built for quick browser sessions

zer.ai is designed for one-off file tasks as well as repeatable workflows. Open the page that matches your need, process a supported input, check the result and download it. Browser support, file limits and format-specific behavior are explained on each tool page so you can choose the right option before processing an important file.