diff --git a/backend/cache/cache.go b/backend/cache/cache.go
index 6977ff2d7..81503a54e 100644
--- a/backend/cache/cache.go
+++ b/backend/cache/cache.go
@@ -684,7 +684,7 @@ func (f *Fs) rcFetch(ctx context.Context, in rc.Params) (rc.Params, error) {
 		start, end int64
 	}
 	parseChunks := func(ranges string) (crs []chunkRange, err error) {
-		for _, part := range strings.Split(ranges, ",") {
+		for part := range strings.SplitSeq(ranges, ",") {
 			var start, end int64 = 0, math.MaxInt64
 			switch ints := strings.Split(part, ":"); len(ints) {
 			case 1:
diff --git a/backend/doi/link_header.go b/backend/doi/link_header.go
index 423ea8d89..c05ebcfd8 100644
--- a/backend/doi/link_header.go
+++ b/backend/doi/link_header.go
@@ -18,7 +18,7 @@ type headerLink struct {
 }
 
 func parseLinkHeader(header string) (links []headerLink) {
-	for _, link := range strings.Split(header, ",") {
+	for link := range strings.SplitSeq(header, ",") {
 		link = strings.TrimSpace(link)
 		parsed := parseLink(link)
 		if parsed != nil {
@@ -30,7 +30,7 @@ func parseLinkHeader(header string) (links []headerLink) {
 
 func parseLink(link string) (parsedLink *headerLink) {
 	var parts []string
-	for _, part := range strings.Split(link, ";") {
+	for part := range strings.SplitSeq(link, ";") {
 		parts = append(parts, strings.TrimSpace(part))
 	}
 
diff --git a/backend/drive/drive.go b/backend/drive/drive.go
index 388444aad..5b25f0c0a 100644
--- a/backend/drive/drive.go
+++ b/backend/drive/drive.go
@@ -191,7 +191,7 @@ func driveScopes(scopesString string) (scopes []string) {
 	if scopesString == "" {
 		scopesString = defaultScope
 	}
-	for _, scope := range strings.Split(scopesString, ",") {
+	for scope := range strings.SplitSeq(scopesString, ",") {
 		scope = strings.TrimSpace(scope)
 		scopes = append(scopes, scopePrefix+scope)
 	}
@@ -1220,7 +1220,7 @@ func isLinkMimeType(mimeType string) bool {
 // into a list of unique extensions with leading "." and a list of associated MIME types
 func parseExtensions(extensionsIn ...string) (extensions, mimeTypes []string, err error) {
 	for _, extensionText := range extensionsIn {
-		for _, extension := range strings.Split(extensionText, ",") {
+		for extension := range strings.SplitSeq(extensionText, ",") {
 			extension = strings.ToLower(strings.TrimSpace(extension))
 			if extension == "" {
 				continue
diff --git a/backend/mailru/mailru.go b/backend/mailru/mailru.go
index d304bb8a3..52695400d 100644
--- a/backend/mailru/mailru.go
+++ b/backend/mailru/mailru.go
@@ -400,7 +400,7 @@ type quirks struct {
 }
 
 func (q *quirks) parseQuirks(option string) {
-	for _, flag := range strings.Split(option, ",") {
+	for flag := range strings.SplitSeq(option, ",") {
 		switch strings.ToLower(strings.TrimSpace(flag)) {
 		case "binlist":
 			// The official client sometimes uses a so called "bin" protocol,
@@ -1770,7 +1770,7 @@ func (f *Fs) parseSpeedupPatterns(patternString string) (err error) {
 	f.speedupAny = false
 	uniqueValidPatterns := make(map[string]any)
 
-	for _, pattern := range strings.Split(patternString, ",") {
+	for pattern := range strings.SplitSeq(patternString, ",") {
 		pattern = strings.ToLower(strings.TrimSpace(pattern))
 		if pattern == "" {
 			continue
diff --git a/backend/webdav/api/types.go b/backend/webdav/api/types.go
index cef1cd701..d49064050 100644
--- a/backend/webdav/api/types.go
+++ b/backend/webdav/api/types.go
@@ -123,7 +123,7 @@ func (p *Prop) Hashes() (hashes map[hash.Type]string) {
 		hashes = make(map[hash.Type]string)
 		for _, checksums := range p.Checksums {
 			checksums = strings.ToLower(checksums)
-			for _, checksum := range strings.Split(checksums, " ") {
+			for checksum := range strings.SplitSeq(checksums, " ") {
 				switch {
 				case strings.HasPrefix(checksum, "sha1:"):
 					hashes[hash.SHA1] = checksum[5:]
diff --git a/bin/not-in-stable.go b/bin/not-in-stable.go
index 5f988af82..2981835b7 100644
--- a/bin/not-in-stable.go
+++ b/bin/not-in-stable.go
@@ -33,7 +33,7 @@ func readCommits(from, to string) (logMap map[string]string, logs []string) {
 	}
 	logMap = map[string]string{}
 	logs = []string{}
-	for _, line := range bytes.Split(out, []byte{'\n'}) {
+	for line := range bytes.SplitSeq(out, []byte{'\n'}) {
 		if len(line) == 0 {
 			continue
 		}
diff --git a/cmd/bisync/bisync_test.go b/cmd/bisync/bisync_test.go
index 0fc680e82..f7c05d5e8 100644
--- a/cmd/bisync/bisync_test.go
+++ b/cmd/bisync/bisync_test.go
@@ -522,7 +522,7 @@ func (b *bisyncTest) runTestCase(ctx context.Context, t *testing.T, testCase str
 	require.NoError(b.t, err)
 	b.step = 0
 	b.stopped = false
-	for _, line := range strings.Split(string(scenBuf), "\n") {
+	for line := range strings.SplitSeq(string(scenBuf), "\n") {
 		comment := strings.Index(line, "#")
 		if comment != -1 {
 			line = line[:comment]
@@ -936,7 +936,7 @@ func (b *bisyncTest) runTestStep(ctx context.Context, line string) (err error) {
 // splitLine splits scenario line into tokens and performs
 // substitutions that involve whitespace or control chars.
 func splitLine(line string) (args []string) {
-	for _, s := range strings.Fields(line) {
+	for s := range strings.FieldsSeq(line) {
 		b := []byte(whitespaceReplacer.Replace(s))
 		b = regexChar.ReplaceAllFunc(b, func(b []byte) []byte {
 			c, _ := strconv.ParseUint(string(b[5:7]), 16, 8)
@@ -1513,7 +1513,7 @@ func (b *bisyncTest) compareResults() int {
 
 		fs.Log(nil, divider)
 		fs.Logf(nil, color(terminal.RedFg, "| MISCOMPARE  -Golden vs +Results for  %s"), file)
-		for _, line := range strings.Split(strings.TrimSpace(text), "\n") {
+		for line := range strings.SplitSeq(strings.TrimSpace(text), "\n") {
 			fs.Logf(nil, "| %s", strings.TrimSpace(line))
 		}
 	}
diff --git a/cmd/bisync/compare.go b/cmd/bisync/compare.go
index cf69b5d1c..9334bec7f 100644
--- a/cmd/bisync/compare.go
+++ b/cmd/bisync/compare.go
@@ -219,8 +219,8 @@ func (b *bisyncRun) setFromCompareFlag(ctx context.Context) error {
 		return nil
 	}
 	var CompareFlag CompareOpt // for exclusions
-	opts := strings.Split(b.opt.CompareFlag, ",")
-	for _, opt := range opts {
+	opts := strings.SplitSeq(b.opt.CompareFlag, ",")
+	for opt := range opts {
 		switch strings.ToLower(strings.TrimSpace(opt)) {
 		case "size":
 			b.opt.Compare.Size = true
diff --git a/cmd/help.go b/cmd/help.go
index ff449b8c8..a99f54ce9 100644
--- a/cmd/help.go
+++ b/cmd/help.go
@@ -344,7 +344,7 @@ func showBackend(name string) {
 				}
 				for _, ex := range opt.Examples {
 					fmt.Printf("    - %s\n", quoteString(ex.Value))
-					for _, line := range strings.Split(ex.Help, "\n") {
+					for line := range strings.SplitSeq(ex.Help, "\n") {
 						fmt.Printf("        - %s\n", line)
 					}
 				}
diff --git a/cmd/serve/proxy/proxy.go b/cmd/serve/proxy/proxy.go
index 7acc0ce7a..efe2fb459 100644
--- a/cmd/serve/proxy/proxy.go
+++ b/cmd/serve/proxy/proxy.go
@@ -182,7 +182,7 @@ func (p *Proxy) run(in map[string]string) (config configmap.Simple, err error) {
 	// Obscure any values in the config map that need it
 	obscureFields, ok := config.Get("_obscure")
 	if ok {
-		for _, key := range strings.Split(obscureFields, ",") {
+		for key := range strings.SplitSeq(obscureFields, ",") {
 			value, ok := config.Get(key)
 			if ok {
 				obscuredValue, err := obscure.Obscure(value)
diff --git a/cmd/test/info/internal/internal.go b/cmd/test/info/internal/internal.go
index 7af06b87a..ce06bbe2f 100644
--- a/cmd/test/info/internal/internal.go
+++ b/cmd/test/info/internal/internal.go
@@ -95,7 +95,7 @@ func (e *Position) UnmarshalText(text []byte) error {
 	switch s := strings.ToLower(string(text)); s {
 	default:
 		*e = PositionNone
-		for _, p := range strings.Split(s, ",") {
+		for p := range strings.SplitSeq(s, ",") {
 			switch p {
 			case "left":
 				*e |= PositionLeft
diff --git a/cmdtest/environment_test.go b/cmdtest/environment_test.go
index 86ab0b4de..9e4f660d2 100644
--- a/cmdtest/environment_test.go
+++ b/cmdtest/environment_test.go
@@ -351,7 +351,7 @@ func TestEnvironmentVariables(t *testing.T) {
 	parseFileFilters := func(out string) (extensions []string) {
 		// Match: - (^|/)[^/]*\.jpg$
 		find := regexp.MustCompile(`^- \(\^\|\/\)\[\^\/\]\*\\\.(.*?)\$$`)
-		for _, line := range strings.Split(out, "\n") {
+		for line := range strings.SplitSeq(out, "\n") {
 			if m := find.FindStringSubmatch(line); m != nil {
 				extensions = append(extensions, m[1])
 			}
diff --git a/fs/config/flags/flags.go b/fs/config/flags/flags.go
index 953a3d0fd..912c0b2d6 100644
--- a/fs/config/flags/flags.go
+++ b/fs/config/flags/flags.go
@@ -70,7 +70,7 @@ func (gs *Groups) Include(groupsString string) *Groups {
 		return gs
 	}
 	want := map[string]bool{}
-	for _, groupName := range strings.Split(groupsString, ",") {
+	for groupName := range strings.SplitSeq(groupsString, ",") {
 		_, ok := All.ByName[groupName]
 		if !ok {
 			fs.Fatalf(nil, "Couldn't find group %q in command annotation", groupName)
@@ -173,7 +173,7 @@ func installFlag(flags *pflag.FlagSet, name string, groupsString string) {
 
 	// Add flag to Group if it is a global flag
 	if groupsString != "" && flags == pflag.CommandLine {
-		for _, groupName := range strings.Split(groupsString, ",") {
+		for groupName := range strings.SplitSeq(groupsString, ",") {
 			if groupName == "rc-" {
 				groupName = "RC"
 			}
diff --git a/fs/mimetype.go b/fs/mimetype.go
index 93f82172d..44d423738 100644
--- a/fs/mimetype.go
+++ b/fs/mimetype.go
@@ -32,7 +32,7 @@ func init() {
 		{"video/x-matroska", ".mpv,.mkv"},
 		{"application/x-subrip", ".srt"},
 	} {
-		for _, ext := range strings.Split(t.extensions, ",") {
+		for ext := range strings.SplitSeq(t.extensions, ",") {
 			if mime.TypeByExtension(ext) == "" {
 				err := mime.AddExtensionType(ext, t.mimeType)
 				if err != nil {
diff --git a/fs/rc/config.go b/fs/rc/config.go
index 2fb0fc424..7aa0c9fed 100644
--- a/fs/rc/config.go
+++ b/fs/rc/config.go
@@ -64,7 +64,7 @@ func filterBlocks(in Params, f func(oi fs.OptionsInfo)) (err error) {
 		return err
 	}
 	blocks := map[string]struct{}{}
-	for _, name := range strings.Split(blocksStr, ",") {
+	for name := range strings.SplitSeq(blocksStr, ",") {
 		if name != "" {
 			blocks[name] = struct{}{}
 		}
diff --git a/fs/sync/sync.go b/fs/sync/sync.go
index e5feb5e3c..a425345a4 100644
--- a/fs/sync/sync.go
+++ b/fs/sync/sync.go
@@ -743,7 +743,7 @@ func parseTrackRenamesStrategy(strategies string) (strategy trackRenamesStrategy
 	if len(strategies) == 0 {
 		return strategy, nil
 	}
-	for _, s := range strings.Split(strategies, ",") {
+	for s := range strings.SplitSeq(strategies, ",") {
 		switch s {
 		case "hash":
 			strategy |= trackRenamesStrategyHash
diff --git a/fstest/runs/run.go b/fstest/runs/run.go
index 2859e7392..c898d3919 100644
--- a/fstest/runs/run.go
+++ b/fstest/runs/run.go
@@ -157,7 +157,7 @@ func testsToRegexp(tests []string) string {
 	// Make a trie showing which parts are used at each level
 	for _, test := range tests {
 		parent := split
-		for _, name := range strings.Split(test, "/") {
+		for name := range strings.SplitSeq(test, "/") {
 			current := parent[name]
 			if current == nil {
 				current = trie{}
diff --git a/fstest/testserver/testserver.go b/fstest/testserver/testserver.go
index 2d7fe44bd..892eecd3b 100644
--- a/fstest/testserver/testserver.go
+++ b/fstest/testserver/testserver.go
@@ -82,7 +82,7 @@ func start(name string) error {
 	// parse the output and set environment vars from it
 	var connect string
 	var connectDelay time.Duration
-	for _, line := range bytes.Split(out, []byte("\n")) {
+	for line := range bytes.SplitSeq(out, []byte("\n")) {
 		line = bytes.TrimSpace(line)
 		part := matchLine.FindSubmatch(line)
 		if part != nil {
diff --git a/lib/encoder/encoder.go b/lib/encoder/encoder.go
index c8f41d76c..faefdfb3c 100644
--- a/lib/encoder/encoder.go
+++ b/lib/encoder/encoder.go
@@ -184,8 +184,8 @@ func (mask MultiEncoder) String() string {
 // Set converts a string into a MultiEncoder
 func (mask *MultiEncoder) Set(in string) error {
 	var out MultiEncoder
-	parts := strings.Split(in, ",")
-	for _, part := range parts {
+	parts := strings.SplitSeq(in, ",")
+	for part := range parts {
 		part = strings.TrimSpace(part)
 		if bits, ok := nameToEncoding[part]; ok {
 			out |= bits
diff --git a/vfs/vfstest/fs.go b/vfs/vfstest/fs.go
index c9db4fa19..0391f855c 100644
--- a/vfs/vfstest/fs.go
+++ b/vfs/vfstest/fs.go
@@ -212,7 +212,7 @@ type dirMap map[string]struct{}
 // Create a dirMap from a string
 func newDirMap(dirString string) (dm dirMap) {
 	dm = make(dirMap)
-	for _, entry := range strings.Split(dirString, "|") {
+	for entry := range strings.SplitSeq(dirString, "|") {
 		if entry != "" {
 			dm[entry] = struct{}{}
 		}