{"id":295,"date":"2024-09-20T10:30:00","date_gmt":"2024-09-20T14:30:00","guid":{"rendered":"https:\/\/www.xconvert.com\/blog\/?p=295"},"modified":"2026-06-17T23:12:34","modified_gmt":"2026-06-18T03:12:34","slug":"how-to-compress-tiff-files-in-macos","status":"publish","type":"post","link":"https:\/\/www.xconvert.com\/blog\/how-to-compress-tiff-files-in-macos","title":{"rendered":"How to Compress TIFF Files on macOS (Preview, Automator &#038; Online)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A single 600 DPI color scan saved as an uncompressed TIFF can run <strong>15-25 MB per page<\/strong> \u2014 beautiful for archival, painful for storage and sharing. macOS has the format covered, but the right tool depends on what you actually want: keep TIFF and shrink it losslessly, or convert to a lighter format like JPG or PDF. This guide walks through Preview and Automator (both built into macOS), explains the compression types TIFF supports, and shows where a server-side tool like xconvert fits when you need exact target sizes or batch control.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> To shrink a TIFF in macOS without changing format, re-save it with <strong>LZW<\/strong> or <strong>ZIP\/Deflate<\/strong> lossless compression. For a much smaller file, use <strong>Preview \u2192 File \u2192 Export<\/strong>, pick <strong>JPEG<\/strong>, click <strong>Options<\/strong>, and drag <strong>Quality to ~85%<\/strong>. For many files at once, use <strong>Automator \u2192 Photos \u2192 Change Type of Images<\/strong> (add a <strong>Copy Finder Items<\/strong> step first to protect originals). For a precise target size \u2014 say \u201cunder 5 MB\u201d \u2014 <a href=\"https:\/\/www.xconvert.com\/compress-tiff\">compress TIFF<\/a> online lets you set the exact KB\/MB you want.<\/p>\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=\"#compression-types\">TIFF compression types, briefly<\/a><\/li><li><a href=\"#preview\">Method 1: shrink a TIFF in Preview<\/a><\/li><li><a href=\"#automator\">Method 2: batch with Automator<\/a><\/li><li><a href=\"#online\">Method 3: hit an exact target size online<\/a><\/li><li><a href=\"#which\">Which method should I use?<\/a><\/li><li><a href=\"#sizes\">How big is a TIFF, really?<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"compression-types\">TIFF compression types, briefly<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TIFF (Tagged Image File Format) was created by Aldus in 1986 and has been maintained by Adobe since it acquired Aldus in 1994; the current TIFF 6.0 specification was finalized in 1992. Unlike JPG, TIFF is a <em>container<\/em> that can hold image data compressed several different ways \u2014 which is why \u201ccompress a TIFF\u201d can mean three quite different things.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Compression<\/th><th>Type<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><strong>None<\/strong><\/td><td>Uncompressed<\/td><td>Largest possible file; every pixel stored raw<\/td><\/tr><tr><td><strong>LZW<\/strong><\/td><td>Lossless<\/td><td>Default in most apps; no quality loss, modest size cut<\/td><\/tr><tr><td><strong>ZIP \/ Deflate<\/strong><\/td><td>Lossless<\/td><td>Often beats LZW on photos and 16-bit images<\/td><\/tr><tr><td><strong>PackBits<\/strong><\/td><td>Lossless<\/td><td>Simple run-length encoding; baseline TIFF<\/td><\/tr><tr><td><strong>CCITT Group 4<\/strong><\/td><td>Lossless (bilevel)<\/td><td>For black-and-white scans only<\/td><\/tr><tr><td><strong>JPEG<\/strong><\/td><td>Lossy<\/td><td>Smallest TIFF, but discards data permanently<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The practical takeaway: <strong>LZW and ZIP are lossless<\/strong> \u2014 they reduce size with zero quality change but typically only 20-40% on a color photo. <strong>JPEG-in-TIFF is lossy<\/strong> \u2014 much smaller, but you lose the archival quality that made you choose TIFF in the first place. If you need a dramatic size cut, converting to JPG or PDF usually beats squeezing the TIFF itself. (Sources: <a href=\"https:\/\/www.loc.gov\/preservation\/digital\/formats\/fdd\/fdd000022.shtml\">Library of Congress TIFF format description<\/a>, <a href=\"https:\/\/en.wikipedia.org\/wiki\/TIFF\">TIFF on Wikipedia<\/a>.)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"preview\">Method 1: shrink a TIFF in Preview<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Preview is the image viewer built into every Mac, and it can re-export a TIFF in a lighter format. This is the fastest path for one or two files.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>Open the file in Preview<\/strong> \u2014 double-click the <code>.tiff<\/code>, or right-click and choose <strong>Open With \u2192 Preview<\/strong>.<\/li><li>Go to <strong>File \u2192 Export<\/strong> in the menu bar.<\/li><li>In the <strong>Format<\/strong> pop-up menu, choose your output:<\/li><li><strong>JPEG<\/strong> for the smallest file (lossy) \u2014 best for photos and single-page scans.<\/li><li><strong>TIFF<\/strong> if you must keep the format \u2014 Preview will re-save with LZW lossless compression.<\/li><li>Hold the <strong>Option<\/strong> key while clicking the Format menu to reveal extra formats like JPEG-2000.<\/li><li>If you picked JPEG, click the <strong>Options<\/strong> button (or expand the <strong>Quality<\/strong> row) and drag the <strong>Quality slider<\/strong> to about <strong>80-90%<\/strong>. Lower quality means a smaller file; 85% is a good balance where most scans look identical to the source.<\/li><li>Choose a destination and click <strong>Save<\/strong>.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">This Export workflow is the same across macOS Ventura, Sonoma, and Sequoia, per <a href=\"https:\/\/support.apple.com\/guide\/preview\/convert-image-file-types-prvw1012\/mac\">Apple Support<\/a>. Note that the Quality slider only appears for lossy formats (JPEG, JPEG-2000) \u2014 exporting back to TIFF or PNG gives you lossless output with no quality control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"automator\">Method 2: batch with Automator<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When you have a folder of TIFFs, Automator (also built into macOS, in your Applications folder) converts them all in one pass.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>Open Automator<\/strong> and choose <strong>File \u2192 New<\/strong>. Select <strong>Quick Action<\/strong> (or <strong>Workflow<\/strong> for a one-off run) and click <strong>Choose<\/strong>.<\/li><li><strong>Protect your originals first.<\/strong> In the Library on the left, find <strong>Copy Finder Items<\/strong>, drag it into the workflow, and pick an output folder. This step copies the files so the conversion never overwrites your source TIFFs \u2014 Apple recommends it for exactly this reason.<\/li><li>In the Library, open the <strong>Photos<\/strong> category and drag <strong>Change Type of Images<\/strong> into the workflow below the copy step. Automator will offer to add the copy step for you if you skipped it.<\/li><li>In the <strong>Change Type of Images<\/strong> action, pick your target format from the pull-down \u2014 <strong>JPEG<\/strong> for the biggest size reduction, or <strong>TIFF<\/strong> to stay lossless.<\/li><li>To run a one-off Workflow: drag your TIFF files onto the workflow (or add a <strong>Get Specified Finder Items<\/strong> action) and click <strong>Run<\/strong> at the top right. Saved as a Quick Action, it appears in Finder\u2019s right-click menu so you can convert any selection of files instantly.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Change Type of Images<\/strong> action is available through macOS Sequoia and supports BMP, JPEG, JPEG-2000, PNG, TIFF, and HEIC output (<a href=\"https:\/\/support.apple.com\/guide\/automator\/use-quick-action-workflows-aut73234890a\/mac\">Apple Automator User Guide<\/a>). Automator does not expose a JPEG quality slider, so for fine control over size, use Preview or an online tool.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"online\">Method 3: hit an exact target size online<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Preview and Automator are great for \u201csmaller,\u201d but neither lets you say \u201cmake this exactly 5 MB\u201d or apply a specific lossless compressor to a batch. That\u2019s where a dedicated tool helps. With <a href=\"https:\/\/www.xconvert.com\/compress-tiff\">compress TIFF<\/a> you can:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>Add your TIFF<\/strong> \u2014 drag and drop, or click <strong>+ Add Files<\/strong> (you can also pull from Google Drive or Dropbox).<\/li><li>Open <strong>Advanced Options<\/strong> and choose a <strong>Compression Type<\/strong> \u2014 JPEG (default, lossy), or lossless LZW, Deflate, PackBits, CCITT Fax 4, WebP, JP2K, or ZSTD.<\/li><li>Set a <strong>target<\/strong>: a percentage of the original, an exact file size in KB or MB, or an image-quality percentage. This is the part desktop tools can\u2019t do \u2014 you name the size, the tool hits it.<\/li><li>Pick the output <strong>file extension<\/strong> (<code>.tiff<\/code> or <code>.tif<\/code> \u2014 they\u2019re the same format) and click <strong>Compress<\/strong>, then download.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Your files upload over an encrypted connection, are processed on xconvert\u2019s servers, and are deleted automatically after a few hours \u2014 nothing is shared. In production the median TIFF drops about <strong>84%<\/strong> with these settings; an 8 MB file commonly lands near 1.3 MB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the goal is generic image shrinking across formats, the same engine powers the <a href=\"https:\/\/www.xconvert.com\/image-compressor\">image compressor<\/a>. And if you\u2019re specifically trying to get a scan under an email cap, the companion guide <a href=\"https:\/\/www.xconvert.com\/blog\/compress-tiff-for-email\">Compress TIFF for Email<\/a> walks through the TIFF-to-PDF and TIFF-to-JPG paths step by step.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"which\">Which method should I use?<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Your situation<\/th><th>Best method<\/th><\/tr><\/thead><tbody><tr><td>One or two files, quick shrink<\/td><td><strong>Preview<\/strong> (File \u2192 Export \u2192 JPEG ~85%)<\/td><\/tr><tr><td>Whole folder, same format<\/td><td><strong>Automator<\/strong> Quick Action<\/td><\/tr><tr><td>Must keep TIFF, zero quality loss<\/td><td>Preview or online \u2192 <strong>LZW \/ ZIP<\/strong> lossless<\/td><\/tr><tr><td>Need an exact size (e.g. under 5 MB)<\/td><td><strong><a href=\"https:\/\/www.xconvert.com\/compress-tiff\">compress TIFF<\/a><\/strong> online \u2014 set the target<\/td><\/tr><tr><td>Multi-page scan for sharing<\/td><td>Convert to <strong>PDF<\/strong> (see the email guide)<\/td><\/tr><tr><td>Black-and-white document scan<\/td><td><strong>CCITT Group 4<\/strong> lossless (online tool)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sizes\">How big is a TIFF, really?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TIFF size is driven far more by <strong>resolution and color depth<\/strong> than by the format itself. A letter-size page scanned at 600 DPI in 24-bit color holds roughly 18 million pixels \u2014 uncompressed, that\u2019s tens of megabytes per page. Drop to 300 DPI grayscale and the same page is a fraction of the size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The rough ranking below shows why TIFF feels heavy next to web formats. Exact bytes vary with image content, but the order is consistent: uncompressed TIFF and BMP sit at the top, lossless formats in the middle, lossy JPEG at the bottom.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Format<\/th><th>Compression<\/th><th>Relative size<\/th><\/tr><\/thead><tbody><tr><td>TIFF (uncompressed)<\/td><td>None<\/td><td>Largest<\/td><\/tr><tr><td>BMP<\/td><td>None<\/td><td>Largest<\/td><\/tr><tr><td>TIFF (LZW\/ZIP)<\/td><td>Lossless<\/td><td>Large (\u224860-80% of uncompressed)<\/td><\/tr><tr><td>PNG<\/td><td>Lossless<\/td><td>Medium<\/td><\/tr><tr><td>TIFF (JPEG) \/ JPG<\/td><td>Lossy<\/td><td>Smallest<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">So if a lossless re-save isn\u2019t shrinking your TIFF enough, the real levers are <strong>lowering the resolution<\/strong>, <strong>converting color to grayscale<\/strong> where appropriate, or <strong>switching to a lossy format<\/strong>. A 600 DPI archival scan rarely needs that resolution for on-screen viewing or email.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Is .tif the same as .tiff?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. <code>.tif<\/code> and <code>.tiff<\/code> are the same Tagged Image File Format; the only difference is the extension length. <code>.tif<\/code> survives from older systems (DOS, early Windows) that limited extensions to three characters. Any modern app reads both, and tools like xconvert let you output either.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Does LZW or ZIP compression lose any quality?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. LZW and ZIP\/Deflate are <strong>lossless<\/strong> \u2014 they rearrange the data to take less space but reconstruct every pixel exactly. The trade-off is modest savings (often 20-40% on photos). For 16-bit TIFFs, ZIP is generally the better choice; LZW can occasionally make a 16-bit file <em>larger<\/em>. Only JPEG compression inside a TIFF is lossy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why is my TIFF still huge after compressing it?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Two usual causes. First, the source is high-resolution color (e.g. 600 DPI, 24-bit) \u2014 resolution dominates file size, so lossless compression alone can\u2019t shrink it dramatically. Second, the file may be multi-page; each page adds up. Reduce the resolution, convert to grayscale, or switch to JPG\/PDF for a real cut.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Will Preview overwrite my original TIFF?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Only if you save over it. <strong>File \u2192 Export<\/strong> lets you choose a new filename and location, so your original stays intact. With Automator, add a <strong>Copy Finder Items<\/strong> step (as in Method 2) so the batch always works on copies \u2014 this is Apple\u2019s recommended way to protect originals during conversion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Should I keep the original uncompressed TIFF?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For archival, legal, or medical workflows: yes. Those policies typically require the lossless master. Treat any JPG, PDF, or lossy-compressed version as a \u201cworking copy\u201d for sharing, and keep the original TIFF in your archive.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can I batch-compress to an exact file size in macOS?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not with the built-in tools. Preview\u2019s Quality slider and Automator\u2019s format picker shrink files but don\u2019t target a specific KB\/MB. For an exact size across many files, use <a href=\"https:\/\/www.xconvert.com\/compress-tiff\">compress TIFF<\/a> and set the target file size directly, or the general <a href=\"https:\/\/www.xconvert.com\/image-compressor\">image compressor<\/a> for mixed formats.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Last verified 2026-06-17.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/support.apple.com\/guide\/preview\/convert-image-file-types-prvw1012\/mac\">Apple Support \u2014 Convert image file types using Preview on Mac<\/a> \u2014 Preview Export, Format pop-up, Quality slider behavior.<\/li><li><a href=\"https:\/\/support.apple.com\/guide\/automator\/use-quick-action-workflows-aut73234890a\/mac\">Apple \u2014 Automator User Guide: Quick Action workflows<\/a> \u2014 Change Type of Images action and supported formats.<\/li><li><a href=\"https:\/\/www.loc.gov\/preservation\/digital\/formats\/fdd\/fdd000022.shtml\">Library of Congress \u2014 TIFF, Revision 6.0 format description<\/a> \u2014 baseline vs. extension compression, history.<\/li><li><a href=\"https:\/\/en.wikipedia.org\/wiki\/TIFF\">TIFF (Wikipedia)<\/a> \u2014 Aldus origin, Adobe maintenance, TIFF 6.0 (1992), <code>.tif<\/code>\/<code>.tiff<\/code> equivalence.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Shrink TIFF files on macOS three ways: lossless LZW\/ZIP, Preview&#8217;s JPEG export, or Automator batch conversion. Plus how to hit an exact target size online.<\/p>\n","protected":false},"author":1,"featured_media":296,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14,4],"tags":[10,52,50,11,51],"class_list":["post-295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools","category-tutorial","tag-compress-image","tag-compress-tif","tag-compress-tiff","tag-file-compression","tag-image-compression"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Compress TIFF Files on macOS (Preview, Automator &amp; Online)<\/title>\n<meta name=\"description\" content=\"Shrink TIFF files on macOS three ways: lossless LZW\/ZIP, Preview&#039;s JPEG export, or Automator batch conversion. 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