{"id":2172,"date":"2026-11-11T09:13:00","date_gmt":"2026-11-11T14:13:00","guid":{"rendered":"https:\/\/www.xconvert.com\/blog\/?p=2172"},"modified":"2026-08-31T23:12:29","modified_gmt":"2026-09-01T03:12:29","slug":"audio-file-size-limits-by-platform","status":"publish","type":"post","link":"https:\/\/www.xconvert.com\/blog\/audio-file-size-limits-by-platform","title":{"rendered":"Audio File Size Limits by Platform in 2026 (Verified Caps)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">You recorded a two-hour interview, exported it as a 320 kbps MP3, and now nothing will take it. WhatsApp refuses it as an audio message. Gmail swaps it for a Drive link. Discord throws it back. Each of those apps draws its line in a different place, and unlike video \u2014 where the answer is always \u201ccompress harder\u201d \u2014 audio size is pure arithmetic: bitrate \u00d7 duration. Once you know the cap, you can work out in advance exactly what will fit and what it will sound like. Every number below was read from the platform\u2019s own documentation on the date in the Sources block.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Quick answer:<\/strong> The caps that actually bite are <strong>WhatsApp 16 MB<\/strong> for an audio message, <strong>Discord 20 MB<\/strong> free (raised from 10 MB in August 2026), and <strong>Gmail \/ <a href=\"http:\/\/Outlook.com\">Outlook.com<\/a> 25 MB<\/strong> per message. The roomy ones almost never bite: <strong>Slack 1 GB<\/strong>, <strong>Telegram 2 GB<\/strong> (4 GB Premium), <strong>SoundCloud 4 GB and 24 hours<\/strong>. Because audio size is bitrate \u00d7 duration, a 25 MB cap holds about <strong>26 minutes at 128 kbps<\/strong> or <strong>52 minutes at 64 kbps<\/strong> \u2014 so the fix is usually to drop the bitrate rather than cut the recording. On <a href=\"https:\/\/www.xconvert.com\/audio-compressor\">xconvert.com\/audio-compressor<\/a>, pick <strong>File Compression \u2192 Specific file size<\/strong> and type the number.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Jump to a section<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#table\">The audio caps, verified<\/a><\/li><li><a href=\"#minutes\">What each cap holds, in minutes<\/a><\/li><li><a href=\"#messaging\">Chat apps: the audio message and the file are two different limits<\/a><\/li><li><a href=\"#creators\">Music and podcast platforms cap length, not bytes<\/a><\/li><li><a href=\"#tool\">Fit any cap with the xconvert audio compressor<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"table\">The audio caps, verified<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Platform<\/th><th>What it limits<\/th><th>Documented limit<\/th><\/tr><\/thead><tbody><tr><td><strong>WhatsApp \u2014 audio message<\/strong><\/td><td>per audio file (AAC, AMR, MP3, M4A, OGG\/Opus)<\/td><td><strong>16 MB<\/strong><\/td><\/tr><tr><td><strong>WhatsApp \u2014 sent as a document<\/strong><\/td><td>per file<\/td><td><strong>2 GB<\/strong><\/td><\/tr><tr><td><strong>Discord \u2014 free<\/strong><\/td><td>per file<\/td><td><strong>20 MB<\/strong> (raised from 10 MB, August 2026)<\/td><\/tr><tr><td><strong>Discord \u2014 Nitro Basic \/ Nitro<\/strong><\/td><td>per file<\/td><td><strong>50 MB \/ up to 500 MB<\/strong><\/td><\/tr><tr><td><strong>Gmail<\/strong><\/td><td>per message, all attachments<\/td><td><strong>25 MB<\/strong><\/td><\/tr><tr><td><strong><a href=\"http:\/\/Outlook.com\">Outlook.com<\/a><\/strong><\/td><td>per message, attached files<\/td><td><strong>25 MB<\/strong> (2 GB via OneDrive)<\/td><\/tr><tr><td><strong>Slack \u2014 all plans<\/strong><\/td><td>per file<\/td><td><strong>1 GB<\/strong><\/td><\/tr><tr><td><strong>Telegram \u2014 free \/ Premium<\/strong><\/td><td>per file<\/td><td><strong>2 GB \/ 4 GB<\/strong><\/td><\/tr><tr><td><strong>SoundCloud<\/strong><\/td><td>per track<\/td><td><strong>4 GB<\/strong>, max <strong>24 hours<\/strong> long<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Three things in that table surprise people:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Discord\u2019s number moved recently, and upward.<\/strong> Discord\u2019s own File Attachments FAQ says <em>\u201cFor non-Nitro subscribers, the maximum file upload is 20MB\u201d<\/em> and explains: <em>\u201cAs of August 2026, the free upload limit is 20MB (up from 10MB), and we\u2019ve aligned how that limit is checked on desktop and mobile.\u201d<\/em> It also warns that it is <em>\u201ccurrently experimenting with various file upload size limits,\u201d<\/em> so a minority of accounts see something different. Any guide quoting 8 MB or 25 MB is out of date.<\/li><li><strong>Discord now checks size <em>before<\/em> compression.<\/strong> The same FAQ notes that mobile used to compress first and complain afterwards; both platforms now check the source file, so the number on disk is the number that counts.<\/li><li><strong><a href=\"http:\/\/Outlook.com\">Outlook.com<\/a>\u2019s ceiling is 25 MB, not 20.<\/strong> Microsoft\u2019s sending-limits page states <em>\u201cThe attachment size limit for files is 25 MB\u201d<\/em>, with OneDrive links raising it to 2 GB. The 20 MB figure that circulates comes from a different Microsoft article about desktop Outlook.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"696\" src=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps.png\" alt=\"Bar chart of the audio caps small enough to force compression: WhatsApp audio message 16 MB, Discord free 20 MB, Gmail 25 MB, Outlook.com 25 MB, Discord Nitro Basic 50 MB\" class=\"wp-image-2169\" srcset=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps.png 1600w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps-300x131.png 300w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps-1024x445.png 1024w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps-768x334.png 768w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/audio-caps-1536x668.png 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The full email picture \u2014 Yahoo, iCloud, Mail Drop and what each provider does with an oversized attachment \u2014 is in <a href=\"https:\/\/www.xconvert.com\/blog\/email-attachment-limits-2026\/\">Email attachment limits: Gmail, Outlook, Yahoo, iCloud<\/a>. The video equivalent of this table lives in <a href=\"https:\/\/www.xconvert.com\/blog\/video-upload-limits-every-platform\/\">Video upload limits by platform<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"minutes\">What each cap holds, in minutes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the part that makes audio different from video. A compressed audio file is very close to a constant number of bits per second, so <strong>file size \u2248 bitrate \u00d7 duration<\/strong>, and you can solve it in either direction before you touch a tool.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Minutes that fit each cap, computed as <code>MB \u00d7 8000 \u00f7 kbps \u00f7 60<\/code> with MB read as 1,000,000 bytes:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Bitrate<\/th><th>16 MB (WhatsApp)<\/th><th>20 MB (Discord free)<\/th><th>25 MB (email)<\/th><th>50 MB (Nitro Basic)<\/th><\/tr><\/thead><tbody><tr><td>320 kbps (MP3 max)<\/td><td>6.7 min<\/td><td>8.3 min<\/td><td>10.4 min<\/td><td>20.8 min<\/td><\/tr><tr><td>256 kbps<\/td><td>8.3 min<\/td><td>10.4 min<\/td><td>13.0 min<\/td><td>26.0 min<\/td><\/tr><tr><td>192 kbps<\/td><td>11.1 min<\/td><td>13.9 min<\/td><td>17.4 min<\/td><td>34.7 min<\/td><\/tr><tr><td>128 kbps<\/td><td>16.7 min<\/td><td>20.8 min<\/td><td>26.0 min<\/td><td>52.1 min<\/td><\/tr><tr><td>96 kbps<\/td><td>22.2 min<\/td><td>27.8 min<\/td><td>34.7 min<\/td><td>69.4 min<\/td><\/tr><tr><td>64 kbps (speech, mono)<\/td><td>33.3 min<\/td><td>41.7 min<\/td><td>52.1 min<\/td><td>104 min<\/td><\/tr><tr><td>32 kbps (voice, mono)<\/td><td>66.7 min<\/td><td>83.3 min<\/td><td>104 min<\/td><td>208 min<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Two useful anchors from the same arithmetic:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Uncompressed WAV is the outlier.<\/strong> CD-quality PCM \u2014 44.1 kHz, 16-bit, stereo \u2014 runs at 1,411 kbps, so 16 MB holds about <strong>91 seconds<\/strong> and 25 MB about <strong>142 seconds<\/strong>. If you are trying to email a WAV, converting the format <em>is<\/em> the fix; nothing else will move the needle by that much.<\/li><li><strong>Speech survives cuts that music does not.<\/strong> A lecture or interview at 64 kbps mono is still perfectly intelligible, and it turns a 25 MB cap into nearly an hour of runtime. Music at 64 kbps is audibly damaged \u2014 see <a href=\"https:\/\/www.xconvert.com\/blog\/make-audio-lower-quality-on-purpose\/\">how to make audio lower quality on purpose<\/a> for what each rung actually sounds like.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"messaging\">Chat apps: the audio message and the file are two different limits<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The single most common mistake is comparing the wrong pair of numbers. On WhatsApp there are two completely separate paths for the same MP3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The WhatsApp Cloud API media reference publishes the media-message ceiling directly: <strong>audio \u2014 AAC (.aac), AMR (.amr), MP3 (.mp3), MP4 Audio (.m4a) and OGG (.ogg, Opus only, mono input only) \u2014 16 MB each.<\/strong> That is the cap on the thing that arrives in the chat as a playable bubble with a waveform and a scrubber.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Send the very same file as a <strong>document<\/strong> instead and WhatsApp\u2019s own help centre puts the ceiling at <strong>2 GB<\/strong>. It arrives as a file to download and open in a player. No waveform, no in-chat playback \u2014 but no compression decision either.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the honest framing for chat apps is: <strong>you are not compressing to make the file sendable. You are compressing to keep the in-chat player.<\/strong> If the recording is long enough that 16 MB would reduce it to 20 kbps mush, attaching it as a file is the better outcome. One exception worth knowing: WhatsApp\u2019s OGG path accepts <strong>Opus only, mono only<\/strong> \u2014 a stereo Ogg Vorbis file is not the same thing and will not be treated as an audio message.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"creators\">Music and podcast platforms cap length, not bytes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Once you leave chat and email, the byte limit usually stops mattering and something else starts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SoundCloud<\/strong> publishes a <strong>4 GB<\/strong> maximum file size and a <strong>24 hour<\/strong> maximum track length \u2014 neither of which you will hit with a normal upload. What you <em>will<\/em> hit is the <strong>plan allowance<\/strong>: Basic gives you up to 2 hours of total upload time, Artist 3 hours, Artist Pro unlimited. SoundCloud also transcodes everything to AAC for streaming (up to 256k \/ 160k \/ 96k renditions depending on the quality of your source), which is why its own guidance is to upload <strong>lossless<\/strong> \u2014 WAV, FLAC, AIFF or ALAC at 16-bit\/44.1 kHz or better \u2014 rather than an MP3 you already squeezed. Compressing before upload here actively costs you quality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Apple Podcasts Connect<\/strong> is the opposite kind of constraint: it specifies <em>formats<\/em>, not sizes. It accepts WAV, FLAC or MP3, and for MP3 it publishes two columns rather than one rule. The <strong>minimum<\/strong> is 44.1 kHz at <strong>64 kbps stereo<\/strong> (32 kbps mono); the <strong>recommended<\/strong> range is 44.1\/48 kHz at <strong>128\u2013256 kbps stereo<\/strong> (96\u2013128 kbps mono). So a 64 kbps stereo file is not out of spec \u2014 it is the published floor. What you are trading away by going that low is quality, not acceptance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The practical rule: <strong>compress for delivery, never for archival.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tool\">Fit any cap with the xconvert audio compressor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.xconvert.com\/audio-compressor\">xconvert audio compressor<\/a> can work backwards from a byte target instead of making you guess a bitrate:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Open <a href=\"https:\/\/www.xconvert.com\/audio-compressor\">xconvert.com\/audio-compressor<\/a> and click <strong>Upload<\/strong> \u2014 <em>From my Computer<\/em>, <em>From Google Drive<\/em> or <em>From Dropbox<\/em>.<\/li><li>Leave the output format on <strong>MP3<\/strong> (the preselected option) unless the destination asks for something else; <strong>AAC, M4A, OGG, OPUS, WAV, FLAC, WMA, AMR<\/strong> and <em>Same as source<\/em> are in the same dropdown.<\/li><li>Under <strong>File Compression<\/strong>, choose <strong>Specific file size<\/strong> and type your number with the unit dropdown on <strong>MB<\/strong> \u2014 <code>16<\/code> for a WhatsApp audio message, <code>20<\/code> for Discord free, <code>25<\/code> for email. The alternatives are <strong>File Size Percentage<\/strong>, <strong>Custom Bitrate<\/strong>, <strong>Constant Bitrate<\/strong> (a fixed ladder from 8 kbps to 384 kbps, opening at 64) and <strong>Variable Bitrate<\/strong>.<\/li><li>For a long spoken recording, set <strong>Audio Channel<\/strong> to <strong>MONO<\/strong> and <strong>Audio Sample Rate<\/strong> to <strong>24000 HZ<\/strong> or <strong>16000 HZ<\/strong>. Halving the channels roughly halves the bitrate you need for the same clarity; speech carries almost nothing above 8 kHz.<\/li><li>If only part of the recording matters, open <strong>Trim<\/strong>, switch it off <strong>Unchanged<\/strong>, and set <strong>Start time<\/strong> and <strong>Duration<\/strong>. Removing five minutes of silence beats squeezing five minutes of silence.<\/li><li>Click <strong>Compress<\/strong> and download.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Your file uploads over an encrypted connection, is processed on our servers, and is <strong>deleted automatically a few hours later<\/strong> \u2014 no sign-up, no watermark. If your target is one of the two numbers everyone searches for, <a href=\"https:\/\/www.xconvert.com\/blog\/compress-audio-to-16mb-or-14mb\/\">compress audio to exactly 16 MB or 14 MB<\/a> works through both.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<h5 class=\"wp-block-heading\">Why does WhatsApp reject my MP3 when the file is only 30 MB?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Because 30 MB is over the <strong>16 MB<\/strong> ceiling Meta publishes for an audio <em>message<\/em>. Two ways out: compress the file below 16 MB and keep the in-chat player, or attach it as a <strong>document<\/strong> instead, where WhatsApp\u2019s documented limit is <strong>2 GB<\/strong>. The document route costs you the waveform and inline playback but nothing else \u2014 and for anything over about half an hour of speech it is the better trade.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Is Discord\u2019s audio limit still 8 MB or 10 MB?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Neither. Discord\u2019s File Attachments FAQ states the free (non-Nitro) maximum is <strong>20 MB<\/strong>, and says so explicitly: \u201cAs of August 2026, the free upload limit is 20MB (up from 10MB).\u201d Nitro Basic is 50 MB and Nitro up to 500 MB. Discord also notes it is experimenting with the limit for some accounts, so treat 20 MB as the number to design for rather than a guarantee.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">What bitrate do I need to fit an hour of audio into 25 MB?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><code>25 \u00d7 8000 \u00f7 3600 \u2248 55 kbps<\/code>. That is fine for a mono voice recording and poor for music. If the hour is an interview or a lecture, set the compressor to a <strong>Specific file size<\/strong> of 25 MB, switch <strong>Audio Channel<\/strong> to <strong>MONO<\/strong>, and it will land there without you choosing a bitrate at all. If the hour is music, split it or use a link instead.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Does zipping an MP3 get it under the limit?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">No, and it is worth understanding why: MP3, AAC and Opus are already entropy-coded, so a ZIP has essentially no redundancy left to exploit and typically saves 0\u20132%. A 26 MB MP3 does not become a 24 MB ZIP. The only levers that move audio size are bitrate, channel count, sample rate and duration.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Should I compress before uploading to SoundCloud or a podcast host?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">No. SoundCloud transcodes every upload to AAC itself and explicitly recommends lossless sources (WAV, FLAC, AIFF, ALAC), so an MP3 you already compressed gets compressed a second time. Apple Podcasts Connect <em>recommends<\/em> MP3 at <strong>128\u2013256 kbps stereo<\/strong> \u2014 its published minimum is 64 kbps stereo \u2014 or WAV\/FLAC, which is above, not below, the bitrates you would use to squeeze a file into a chat app. Compress for chat and email; upload the master everywhere else.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Why is my WAV enormous when the MP3 of the same recording is tiny?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">WAV is normally uncompressed PCM: 44.1 kHz \u00d7 16 bits \u00d7 2 channels = <strong>1,411 kbps<\/strong>, about eleven times a 128 kbps MP3 \u2014 10.6 MB per minute. Changing the <em>format<\/em> to MP3, M4A or Opus is the fix; no size slider closes a gap that large on its own.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Last verified 2026-08-31.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/developers.facebook.com\/docs\/whatsapp\/cloud-api\/reference\/media\">WhatsApp Cloud API \u2014 Media reference (supported media types)<\/a> \u2014 the published per-file audio ceiling: AAC, AMR, MP3, MP4 Audio and OGG (Opus codecs only, mono input only) at <strong>16 MB<\/strong> each; images 5 MB, documents 100 MB.<\/li><li><a href=\"https:\/\/faq.whatsapp.com\/453914586839706\/\">WhatsApp Help Center \u2014 How to send media, contacts, or location<\/a> \u2014 \u201cThe maximum allowed document size is 2 GB\u201d, plus the connection-dependent video defaults (100 MB\/720p and 64 MB\/480p).<\/li><li><a href=\"https:\/\/support.discord.com\/hc\/en-us\/articles\/25444343291031-File-Attachments-FAQ\">Discord Support \u2014 File Attachments FAQ<\/a> \u2014 \u201cFor non-Nitro subscribers, the maximum file upload is 20MB\u201d; \u201cAs of August 2026, the free upload limit is 20MB (up from 10MB)\u201d; Nitro Basic 50 MB and Nitro up to 500 MB; the pre-compression size check; and the note that Discord is \u201ccurrently experimenting with various file upload size limits.\u201d<\/li><li><a href=\"https:\/\/support.google.com\/mail\/answer\/6584\">Gmail Help \u2014 Send attachments with your Gmail message<\/a> \u2014 \u201cFor personal Gmail accounts, the limit is 25 MB\u201d, with oversized attachments converted to Google Drive links.<\/li><li><a href=\"https:\/\/support.microsoft.com\/en-us\/office\/sending-limits-in-outlook-com-279ee200-594c-40f0-9ec8-bb6af7735c2e\">Microsoft Support \u2014 Sending limits in Outlook.com<\/a> \u2014 \u201cThe attachment size limit for files is 25 MB\u201d; OneDrive-shared files up to 2 GB.<\/li><li><a href=\"https:\/\/slack.com\/help\/articles\/201330736-Add-files-to-Slack\">Slack Help Center \u2014 Add files to Slack<\/a> \u2014 \u201cYou can add files up to 1GB in size.\u201d<\/li><li><a href=\"https:\/\/telegram.org\/faq\">Telegram FAQ<\/a> \u2014 \u201cSend and receive files of any type, up to 2 GB in size each (or 4 GB with Premium).\u201d<\/li><li><a href=\"https:\/\/help.soundcloud.com\/hc\/en-us\/articles\/360039171614-Upload-Requirements\">SoundCloud Help \u2014 Upload Requirements<\/a> \u2014 \u201cMaximum file size: 4 GB (uncompressed)\u201d, \u201cMaximum track length: 24 hours\u201d, plan allowances (Basic 2 hours, Artist 3 hours, Artist Pro unlimited), the lossless recommendation, and the AAC 256k\/160k\/96k transcode ladder.<\/li><li><a href=\"https:\/\/podcasters.apple.com\/support\/893-audio-requirements\">Apple Podcasters Support \u2014 Audio requirements<\/a> \u2014 \u201cApple Podcasts Connect accepts WAV, FLAC, or MP3\u201d, and the MP3 table\u2019s two columns: minimum \u201cSampling rate: 44.1 kHz \/ Bit rate: 64 kbps\u201d for stereo (32 kbps mono) against recommended \u201cSampling rate: 44.1\/48 kHz \/ Bit rate: 128\u2013256 kbps\u201d for stereo (96\u2013128 kbps mono).<\/li><li><a href=\"https:\/\/www.xconvert.com\/audio-compressor\">xconvert audio compressor<\/a> \u2014 live tool; the control names, the MP3 default, the <strong>File Size Percentage \/ Specific file size \/ Custom Bitrate \/ Constant Bitrate \/ Variable Bitrate<\/strong> modes, the 8\u2013384 kbps constant-bitrate ladder, and the <strong>Audio Channel<\/strong>, <strong>Audio Sample Rate<\/strong> and <strong>Trim<\/strong> groups were read from the page.<\/li><li><strong>Arithmetic<\/strong> \u2014 every minutes figure is <code>MB \u00d7 8000 \u00f7 kbps \u00f7 60<\/code> with MB as 1,000,000 bytes, and the PCM figure is <code>44,100 \u00d7 16 \u00d7 2 = 1,411 kbps<\/code>. Computed, not measured.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Audio file size limits by platform: WhatsApp 16 MB, Discord 20 MB, Gmail 25 MB, Slack 1 GB \u2014 verified at the source, with minutes-per-cap math.<\/p>\n","protected":false},"author":3,"featured_media":2170,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[],"class_list":["post-2172","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Audio File Size Limits by Platform in 2026 (Verified Caps)<\/title>\n<meta name=\"description\" content=\"Audio file size limits by platform: WhatsApp 16 MB, Discord 20 MB, Gmail 25 MB, Slack 1 GB \u2014 verified at the source, with minutes-per-cap math.\" 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