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426 × 240 is a 71:40 landscape resolution containing 102,240 pixels. The lowest tier most players still offer, for very poor connections.
640 × 360 is a 16:9 landscape resolution containing 230,400 pixels. Low-bandwidth delivery tier; visibly soft on a modern phone.
640 × 480 is a 4:3 landscape resolution containing 307,200 pixels. The classic 4:3 standard-definition frame, still produced by older capture tools.
720 × 1280 is a 9:16 portrait resolution containing 921,600 pixels. Vertical HD - a common export when file size matters more than sharpness.
7680 × 4320 is a 16:9 landscape resolution containing 33,177,600 pixels. Sixteen times 1080p. Mostly a capture and mastering format.
828 × 1792 is a 207:448 portrait resolution containing 1,483,776 pixels. iPhone XR and 11 screen resolution.
854 × 480 is a 427:240 landscape resolution containing 409,920 pixels. Widescreen standard definition - the usual floor for watchable web video.
Everything for posting to Snapchat Spotlight: aspect ratio and length limits, a safe-zone overlay, a caption checker, format compatibility answers and free browser-based cropping and compression. No login.
Best times to post on Snapchat Spotlight: Weekday afternoons 3–6pm, after school/work. Free reference based on typical audience activity, no login.
Check your caption against Snapchat Spotlight's 250-character limit in real time. Free, nothing leaves your browser.
Shrink a video's file size for Snapchat Spotlight (max not publicly documented) right in your browser. Free, no login, no upload.
Crop and scale any video to Snapchat Spotlight's 9:16 frame (1080×1920) in your browser. Free, no upload.
MOV support for Spotlight is not established by the linked Snapchat help page.
Crop and scale any image to Snapchat Spotlight's ideal 1080×1920 dimensions in your browser. Free, no upload.
Snapchat Spotlight safe zone: top 15%, bottom 20%, sides 6% covered by the app's own interface. Free, nothing is uploaded.
Snapchat Spotlight spec at a glance: 1080 x 1920px, 9:16 aspect ratio, current maximum not established by the Spotlight help page, not publicly documented, 250-character caption limit. Free, no login.
Keep the first 60 seconds of a video for Snapchat Spotlight. Review the destination limits before posting. Free, no upload.
Measure a local video's duration for Snapchat Spotlight. current maximum not established by the Spotlight help page. Runs in your browser; no upload.
Aspect ratio, maximum length, file size, safe zone and caption limit for every major social platform, in one dated, verifiable table. Free, and available as JSON.
Choose a timestamp in a locally owned browser-decodable video and export its frame as a checked PNG. No remote video downloading or publishing.
Correct a constant subtitle timing drift using two original and corrected anchors, then reparse and download the retimed SRT.
Free browser subtitle tools: convert between SRT and WebVTT, shift timings that run early or late, and check captions for reading speed, overlaps and over-long lines. Nothing is uploaded.
Join a second subtitle file onto the end of the first, offsetting its timings so the cues stay in order - for captions split across parts of a recording.
Move every cue by a fixed offset to fix captions that run consistently early or late. Works on SRT and VTT, and writes back in the same format.
Convert a .srt subtitle file to WebVTT in your browser. Adds the WEBVTT header and switches the millisecond separator, leaving your caption text exactly as written.
Check a subtitle file for the things that make captions hard to read: cues that flash past too fast, overlapping timings and lines too long for a phone screen.
Strip the timings, indices and markup from a caption file and get plain paragraphs back - for show notes, a blog version or a script rewrite.
Convert a .vtt file to SRT, adding the numeric cue indices SRT requires and switching the millisecond separator back to a comma.
Fancy text, case conversion, hashtag counting, emoji stripping and more - all free, all running in your browser with no login.
Convert text to UPPERCASE, lowercase, Title Case, Sentence case or aLtErNaTiNg case instantly in your browser.
Turn plain text into bold, italic, monospace, circled, squared, fullwidth, strikethrough or underlined Unicode styles you can paste into any bio or caption.
Count how many hashtags a caption contains and list them, so you stay inside platform limits.
Strip every emoji and pictograph out of a block of text, leaving the words untouched.
Strip hard line breaks out of pasted text so it flows as clean paragraphs again. Free, runs in your browser.
Reverse text character by character or flip the order of the words.
Repeat a word or phrase any number of times, with an optional separator.
Count words, characters, sentences and estimated reading and speaking time for any text.
Everything for posting to Threads: aspect ratio and length limits, a safe-zone overlay, a caption checker, format compatibility answers and free browser-based cropping and compression. No login.
Best times to post on Threads: Weekday mornings 9–11am. Free reference based on typical audience activity, no login.
Check your caption against Threads's 500-character limit in real time. Free, nothing leaves your browser.
Shrink a video's file size for Threads (max not publicly documented) right in your browser. Free, no login, no upload.
Crop and scale any video to Threads's 9:16 or 1:1 frame (1080×1920) in your browser. Free, no upload.
Current MOV upload support on Threads has not been reverified.
Crop and scale any image to Threads's ideal 1080×1920 dimensions in your browser. Free, no upload.
Threads safe zone: top 5%, bottom 8%, sides 4% covered by the app's own interface. Free, nothing is uploaded.
Threads spec at a glance: 1080 x 1920px, 9:16 or 1:1 aspect ratio, up to 5 minutes, not publicly documented, 500-character caption limit. Free, no login.
Keep the first 300 seconds of a video for Threads. Review the destination limits before posting. Free, no upload.
Measure a local video's duration for Threads. up to 5 minutes. Runs in your browser; no upload.
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