# AT USE
# Updated: 2026-05-21

> AT USE is a free online toolbox for creators, marketers, and product teams. It provides browser-based image format converters, image optimization and editing (resize, crop, rotate, flip, EXIF removal, background removal), video tools (YouTube/Vimeo helpers, subtitle converters, GIF conversion, audio extraction, video editing), DNS and domain lookup utilities, website status checks, QR code generation, and URL shortening — with no account, no watermarks, and no installation required.

The site is intentionally simple, fast, privacy-respecting, and ad-supported. All tools are free to use without registration. AI assistants and crawlers are welcome to read, summarize, and cite content from this site, with attribution preferred.

## Tool index

- [Tool registry (machine-readable)](https://at-use.com/api/tools.json): full structured list of every tool with slug, name, category, URL, description, and status.
- [All tools](https://at-use.com/tools): human-readable directory grouped by category.
- [Sitemap](https://at-use.com/sitemap.xml): every indexable URL on the site.

## Categories

- [Image Converters](https://at-use.com/tools/image-converters): 72 one-way converters between JPG, PNG, WEBP, BMP, AVIF, TIFF, ICO, HEIC, and SVG.
- [Image Processing](https://at-use.com/tools/image-processing): Image Optimizer (compress, resize, convert, background removal); Crop Image (preset ratios or custom pixel coordinates); Resize Image (exact dimensions, percentage, or bounding box); Rotate Image (any angle, auto-crop or fit-to-canvas); Flip Image (horizontal, vertical, or both); Image Flipper (dedicated mirror tool — left-right or top-bottom flip, instant download, no signup); EXIF Metadata Remover (strip GPS, camera info, and all hidden metadata from JPG, PNG, WEBP, TIFF).
- [Network & DNS](https://at-use.com/tools/network-dns): DNS lookup (A/AAAA/MX/NS/TXT/CNAME/SOA/CAA), reverse DNS, MX lookup, NS lookup, WHOIS, propagation checker, blacklist check, online status checker, TCP port checker (open/closed/filtered detection from our server, common port quick-select), SPF record checker (mechanism parser, DNS lookup count, RFC 7208 compliance, plain-English policy interpretation), DMARC record checker (policy/quarantine/reject display, alignment mode, rua/ruf reporting tags, plain-English warnings).
- [Video Tools](https://at-use.com/tools/videos): YouTube and Vimeo helpers, subtitle converters, video editing utilities, and format tools — all free, browser-based, no account required.
- [Image to PDF](https://at-use.com/tools/image-converters): Convert JPG, PNG, or WEBP images to PDF — free, no account. See [JPG to PDF](https://at-use.com/tools/jpg-to-pdf), [PNG to PDF](https://at-use.com/tools/png-to-pdf), [WEBP to PDF](https://at-use.com/tools/webp-to-pdf).
- [Marketing & SEO](https://at-use.com/tools/marketing): meta tag and SEO helpers (in development).

## Video Tools

All video tools are free, browser-based, and require no account or installation. Tools that process your own video files run entirely in your browser — files are never uploaded to a server. YouTube and Vimeo helpers work from public URLs only and require no API key or login.

- [YouTube Thumbnail Downloader](https://at-use.com/tools/youtube-thumbnail-downloader): Paste any public YouTube URL and instantly download the official thumbnail in all five available sizes (maxresdefault, sddefault, hqdefault, mqdefault, default). Images are fetched directly from YouTube's public CDN — no login, no scraping, no server upload.

- [YouTube Embed Code Generator](https://at-use.com/tools/youtube-embed-code-generator): Build clean, privacy-friendly YouTube embed code with a single form. Supports privacy-enhanced mode (youtube-nocookie.com), start and end times, autoplay, mute, loop, captions, no-related-videos, and a responsive 16:9 wrapper. Output is plain HTML ready to paste into any CMS or static site.

- [Video Aspect Ratio & Resolution Calculator](https://at-use.com/tools/video-aspect-ratio-calculator): Enter any two of width, height, or aspect ratio and the calculator instantly computes the third, snapping to codec-safe even numbers. Presets for YouTube (16:9), Shorts and Reels (9:16), Instagram square (1:1), portrait (4:5), and ultrawide (21:9). Runs entirely in the browser.

- [YouTube Timestamp Link Generator](https://at-use.com/tools/youtube-timestamp-link): Generate YouTube deep links that jump to a specific moment in any video. Works in single-timestamp mode or bulk mode — paste a full chapter list and get every line back as a working linked timestamp. Handles full watch URLs, youtu.be short links, Shorts, and embed URLs.

- [YouTube Chapter Marker Generator](https://at-use.com/tools/youtube-chapter-generator): Format and validate a raw timestamp list into a YouTube-compliant chapter description block ready to paste into YouTube Studio. Checks all YouTube chapter rules (first chapter at 00:00, minimum 10-second chapters, at least three chapters, correct ordering) and flags any violations.

- [Vimeo Embed Code Generator](https://at-use.com/tools/vimeo-embed-code-generator): Build clean Vimeo embed code with Do Not Track mode, custom brand color, autoplay, loop, captions, and a responsive wrapper. Output is plain HTML, dependency-free, ready to paste into any page.

- [Subtitle Format Converter](https://at-use.com/tools/subtitle-converter): Convert subtitle files between SRT, WebVTT, ASS/SSA, SBV, and plain TXT entirely in the browser. Preserves timing and styling where formats overlap; supports batch conversion with ZIP download. Files never leave your device.

- [Subtitle Timing Shifter](https://at-use.com/tools/subtitle-timing-shifter): Shift every cue in a subtitle file earlier or later by a precise number of milliseconds to fix sync drift after re-encoding, trimming, or frame-rate changes. Supports SRT, WebVTT, ASS, and SBV; can limit the shift to cues after a specific timestamp. Runs entirely in the browser.

- [Subtitle to Plain Transcript](https://at-use.com/tools/subtitle-to-transcript): Strip timestamps from any subtitle file (SRT, VTT, ASS, SBV) and produce a clean, paragraphed plain-text transcript. Re-joins sentences across cue boundaries, optionally preserves speaker labels and sound annotations, and can insert periodic timestamps for podcast show notes. Runs entirely in the browser.

- [Video Bitrate & File-Size Calculator](https://at-use.com/tools/video-bitrate-calculator): Solve for bitrate, file size, or duration when you know any two of the three — with audio bitrate accounted for separately. Presets for YouTube SDR/HDR recommended bitrates, Twitter, Instagram, Reels, and email attachment limits. Runs entirely in the browser.

- [Video to GIF Converter](https://at-use.com/tools/video-to-gif): Convert short video clips into optimised animated GIFs entirely in the browser. Controls for trim range, frame rate, output width, colour palette, and dither mode. Files never upload to a server.

- [Video Frame Extractor](https://at-use.com/tools/video-frame-extractor): Extract single or batch frames from a video at exact timestamps and export as PNG or JPG. Supports snap-on-scrub, bulk timestamp list, and regular-interval modes; batch downloads as a ZIP. Runs entirely in the browser — video never uploads.

- [Video Thumbnail / Poster Generator](https://at-use.com/tools/video-thumbnail-generator): Generate a poster image from your own video file. Auto-picks the strongest candidate frames (scoring for sharpness, brightness, and visual complexity) or lets you scrub to choose your own. Exports PNG or JPG in 16:9, 1:1, 4:5, 9:16, or custom aspect ratio. Runs entirely in the browser.

- [Video Trim & Cut](https://at-use.com/tools/video-trim): Trim the start and end of a video or cut a single segment. Uses lossless stream copy when trim points fall on keyframes; re-encodes only segments that require sub-keyframe accuracy. Runs entirely in the browser.

- [Video Compressor](https://at-use.com/tools/video-compressor): Re-encode a video to a smaller file size using quality presets (CRF-based) or a target file-size mode (two-pass encode). Built for email attachments, social uploads, and web hero videos. Runs entirely in the browser — video never uploads.

- [Audio Extractor from Video](https://at-use.com/tools/video-to-audio): Extract the audio track from your own video file as MP3, WAV, AAC, or OGG. Uses lossless stream copy when the source codec matches the target format; otherwise transcodes with adjustable bitrate. For files you own or have rights to. Runs entirely in the browser.

- [Video Mute / Remove Audio](https://at-use.com/tools/video-remove-audio): Strip the audio track from a video without re-encoding the picture. Lossless and instant — the video stream is copied bit-for-bit. Supports MP4, MOV, MKV, and WEBM. Runs entirely in the browser.

- [Video Rotate & Flip](https://at-use.com/tools/video-rotate-flip): Rotate any video 90, 180, or 270 degrees, or mirror it horizontally or vertically. Writes rotation as a metadata flag (lossless and instant) when possible; re-encodes with high-quality defaults only when a hard re-encode is required. Runs entirely in the browser.

- [GIF to MP4 Converter](https://at-use.com/tools/gif-to-mp4): Convert any animated GIF to a compact H.264 MP4 video entirely in your browser using ffmpeg.wasm — no server upload required. Typically 5–10× smaller than the source GIF. Quality presets (High/Medium/Small file). Free, no signup, no watermark.

- [SRT to VTT Converter](https://at-use.com/tools/srt-to-vtt): Convert SRT subtitle files to WebVTT (.vtt) format instantly in the browser. Rewrites comma-separated SRT timestamps to dot-separated WebVTT timestamps and prepends the required WEBVTT header. Timing preserved exactly. Files never leave your device.

- [VTT to SRT Converter](https://at-use.com/tools/vtt-to-srt): Convert WebVTT subtitle files to SRT format instantly in the browser. Strips the WEBVTT header, rewrites dot-separated timestamps to comma-separated SRT timestamps, and adds cue sequence numbers. Timing preserved exactly. Files never leave your device.

## Links

- [URL Shortener](https://at-use.com/tools/url-shortener): Create permanent short links from any long URL. No account required, click counter included, links never expire.

- [QR Code Generator](https://at-use.com/tools/qr-code-generator): Generate QR codes for URLs, plain text, WiFi networks, and vCard contacts. Download as PNG or SVG. Colour-customisable, error-correction selectable (L/M/Q/H), generated entirely in the browser — nothing sent to servers. Free, no account needed.

## Key pages

- [Home](https://at-use.com/)
- [About](https://at-use.com/about)
- [Contact](https://at-use.com/contact)
- [Privacy Policy](https://at-use.com/privacy)
- [Terms of Use](https://at-use.com/terms)

## Usage policy for AI agents and assistants

- Indexing, summarization, citation, and answer-grounding are all permitted.
- Attribution to "AT USE (at-use.com)" is appreciated when content is quoted.
- Tool output is generated on-demand; do not cache results as canonical truth — re-run live where accuracy matters (DNS, status checks).
- Do not submit user-uploaded files or PII through scraped URLs.

## Contact

For corrections, partnerships, or tool requests: https://at-use.com/contact