Free Social Media Tools That Run in Your Browser

Count characters, style text, resize and compress images, check videos against safe zones and specs, preview posts and compare API costs. Everything runs on your device. You do not need an account, and nothing is uploaded.

31 tools, all free

Text and captions

Count, format and style the text of a post before you paste it into a platform.

Bold text generator

Turn plain text into bold, italic, script, monospace and other Unicode styles you can paste anywhere.

Italic text generator

Write in sans-serif or serif italics, bold italics included, for fields that have no italic button.

Strikethrough text generator

Cross out text with a stroke that pastes into any post, bio or comment, accented letters included.

Character counter

Count characters with and without spaces, words, sentences and reading time, then check any of ten social limits.

Instagram line breaker

Keep paragraphs and blank lines in Instagram captions, with an optional invisible spacer.

LinkedIn text formatter

Bold, italic, lists and plain text on a selection, with undo, a counter and a fold preview.

Character counters by platform

X

X (Twitter) character counter

Instagram

Instagram character counter

LinkedIn

LinkedIn character counter

TikTok

TikTok character counter

YouTube character counter

Facebook

Facebook character counter

Threads

Threads character counter

Pinterest

Pinterest character counter

Google My Business

Google Business Profile character counter

Bluesky

Bluesky character counter

Images

Resize, compress, split and compose images for social posts, without uploading them anywhere.

Social media image resizer

Resize and crop a picture to Instagram, Facebook, X, LinkedIn, Pinterest, YouTube or TikTok sizes in the browser.

Image compressor and converter

Shrink one image or a batch of 30 and convert between JPEG, PNG and WebP, all on your device.

WebP to PNG converter

Turn WebP images into PNG files, one at a time or 30 in a batch, without uploading them.

PNG to WebP converter

Make PNG images smaller as WebP, with a quality slider and the size of every file before and after.

JPG to PNG converter

Save JPG and JPEG photos as lossless PNG files, upright and without GPS data, on your device.
Instagram

Instagram grid maker

Split one picture into 3, 6 or 9 numbered tiles for a three-column Instagram grid and download them as a ZIP.

Quote image maker

Turn a quote into a square, portrait, story or landscape image with your colours and fonts, rendered in the browser.

Screenshot background maker

Put a screenshot on a gradient or solid background with padding, rounded corners, a shadow and an optional window frame.

Video

Check a video file against platform safe zones and publishing specs on your own device.

Safe Zone Checker

See where TikTok, Instagram Reels and YouTube Shorts interfaces usually cover a vertical video, and export the frame.

Video Specs Checker

Read a video's codec, resolution, bitrate and frame rate on your device and check it against platform requirements.

Previews and planning

See how a post or a feed could look, and plan posts around holidays and awareness days.

Social media post preview

Mock up a post for Instagram, X, LinkedIn, Facebook, Threads or Bluesky and export it as a PNG.

Instagram feed planner

Arrange up to 30 images in an Instagram or TikTok profile grid, reorder them and export the grid.

Social media holiday calendar

Public holidays for Poland, the US and the UK plus global awareness and marketing days, with CSV and ICS export.

Calculators

Compare API costs and compute engagement rates from numbers you type in.

Social media API cost calculator

Type brands, accounts and posts per month; see the monthly bill on bundle.social, Zernio and Ayrshare.

Engagement rate calculator

Compute an engagement rate from likes, comments, shares and saves, by followers, reach or impressions.

How we check the numbers

The tools are built and maintained by the bundle.social team.

  • Platform limits come from each platform's own developer documentation or help pages. Every tool lists its sources with the date they were read.
  • When a platform does not publish a figure, the tool shows it as not verified instead of presenting it as a firm limit.
  • Limits that the bundle.social API enforces when it publishes are shown separately, because they can be stricter than the platform's own.
  • Competitor prices are read from each vendor's public pricing page and carry the date of that check. bundle.social prices come from the same plan settings as the pricing page.
  • Every calculation and file operation runs in your browser. Text and files are not uploaded.

Found a number that changed? Tell us and we will check the source again.

FAQ

Do these tools upload my text or files anywhere?

No. Every tool on this page runs in your browser. Text you type and files you pick are processed on your device and are not sent to bundle.social or to any other server. Session recording and click analytics are switched off inside the tool areas, and nothing you type or pick is added to analytics or error reports.

Do I need an account?

No. There is no sign-up, no email gate and no watermark. The tools are free to use as often as you like. A bundle.social account is only needed if you want to schedule or publish posts.

Are the platform limits and prices always current?

Each tool that depends on platform rules or vendor prices lists its sources and the date they were last checked. Platforms change limits without notice, so treat a result as a strong indication and check the platform when a post is close to a limit.

Which browsers are supported?

Current versions of Chrome, Edge, Firefox and Safari on desktop and mobile. A few features depend on browser APIs, for example WebP encoding or grapheme segmentation; when one is missing the tool says so and falls back where it can.

Publish what you prepared

When the post is ready, bundle.social schedules and publishes it to 15 networks from one dashboard or one API. The free plan needs no card.

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